Level 51 (PITGB: 41)
Once the yellow Tiny has reappeared on the screen, you shall have to walk to the right to collect two coins, and switch to the green Tiny; once you have done it you will have to jump up to collect four coins, latch onto the underside of a pipe above you with the grappling hook and swing up to another pipe. You will now have to latch onto the undersides of four platforms above you with the grappling hook and swing up to each of them in turn, while watching out for two machine guns and a bomb-throwing Tiny, and switch back to the yellow Tiny - and once you've done this, you'll have to shoot five fireballs at that bomb-throwing Tiny to kill him. You'll then have to switch back to the green Tiny; once you have done so, you will have to latch onto the undersides of three final platforms above you with the grappling hook and swing up to each of them in turn, latch onto the ceiling with the grappling hook and swing over to land on another pipe, and drop down to land on a pair of crushing pistons (when they move apart, the Tiny shall fall down onto the "EXIT" sign).
Level 52 (PITGB: 42)
Once the green Tiny has reappeared on the screen, you will have to jump back to the left onto a handcart to start it moving to the right; once it has fallen off the starting platform and onto another one, a metal door will slide up allowing it to pass through, and you shall have to jump off it onto a third platform before it falls into a pool of acid. You'll now have to switch to the yellow Tiny - and once you have done so, you will have to shoot three fireballs at a slug to kill him. You'll then have to jump onto the first (bottom) step of a magnetic platform; once you do so, a magnet will come into view on the underside of the conveyor belt above you, lift the magnetic platform up to it, carry it back to the left as another metal door slides down allowing it to pass through and drop it on that second platform before it starts moving back to the right again. You'll now have to latch onto another magnet on the underside of another conveyor belt above you with the grappling hook to get carried over to a fourth platform, then drop down to the left onto the "EXIT" sign to end the level.
Level 53 (PITGB: 43)
Once the green Tiny has appeared on the screen, you shall have to drop down onto two crates and a platform in turn and switch to the yellow Tiny; once you have done so you will have to shoot two fireballs at a rat to kill him. You will then have to latch onto a microscopic piece of a pipe above you with the grappling hook, swing up onto a second platform to collect seven coins, while watching out for a hook on the underside of a conveyor belt over you, drop back down onto the ground, and walk back to the left to enter a teleporter and get warped over to a third platform - and, once you have done so, you will have to switch to the blue Tiny. You shall now have to drop back down to the left onto a fourth platform and into a pool of water (while watching out for a frogspawn egg), push a switch on the left side of a fifth platform (it has no noticable effect), swim back up to that third platform (while again watching out for the frogspawn egg), and switch back to the green Tiny; once you've done so, you will have to latch onto the undersides of two lighting fixtures above you with the grappling hook in turn, swing back over to the left onto the top of the fourth platform, and enter another teleporter to get warped back to the first one. You will then have to switch back to the yellow Tiny - and once you have done so, you will have to jump over a spike pit onto a fifth platform to collect two more coins, and shoot two more fireballs at another rat to kill him. You shall now have to switch to the red Tiny; once you have done so, you shall have to jump onto two more crates and a sixth platform in turn to collect a tenth coin and a key, and jump to warp to a fifty-third bonus level. Once this fifty-third bonus level appears on the screen, that green Tiny will reappear in it, and you'll have 25 seconds to collect all 16 coins in it and reach the "EXIT" sign - and once the red Tiny has reappeared back in the main level you will have to drop back down onto the fifth platform, push against a brick with a keyhole in it (it shall slide up), walk to the right under the now-slid-up keyhole brick and drop down onto the "EXIT" sign in order to end the level.
Level 54 (PITGB: 44)
Once the red Tiny has reappeared on the screen, you have to drop down onto one of two platforms that are moving around in an anticlockwise direction, jump onto the left side of a third static platform, and push against its chain to cause a crate to drop down onto a fourth platform; once you have done so, you will have to drop back down onto one of the two moving platforms, jump onto the now-fallen crate and the right side of the third platform in turn, and jump up to enter a teleporter that shall warp you down through a yellow-Tiny-activating colour field to a fifth platform. You will then have to push a metal platform to the right into another teleporter to warp it up to the starting platform, and enter this second teleporter yourself to get warped back up onto it - and once you have done so, you will have to drop back down onto the left side of that starting platform, push the metal platform to the right until it drops down onto a block over a spike pit, drop down onto a sixth platform, turn back to the left, and shoot three fireballs at a wall-climbing Tiny (while avoiding the projectiles he's firing at you) to kill him. Once you have done it, you will have to jump back to the left onto the metal platform and a seventh platform in turn and push another block back to the right until it falls into the spike pit; once you do so, you have to push the metal platform back to the right, and jump onto it and the fourth platform in turn to collect a key. You shall now have to drop back down onto the metal and sixth platforms in turn, drop down onto a brick with a keyhole in it (it will slide to the right), drop down to the left onto a seventh platform, make that Tiny eat through five blocks under him, and make him eat through two blocks in the wall to his left to be warped to a fifty-fourth bonus level - and once the fifty-fourth bonus level appears upon the screen, that green Tiny will reappear in it, and you will have 30 seconds to collect all 23 coins in it and reach the "EXIT" sign. Once the red Tiny has reappeared in the main level, you have to walk back to the right, and make the Tiny eat through a sixth block underneath him to drop down to an eighth platform and collect six more coins (which are arranged to spell an equals sign); once you have done so you will have to jump back to the left to collect twenty-eight more coins (which are arranged to spell out 6 x 9) and enter a third teleporter to warp back up to that starting platform again. You will then have to drop back down onto the second block and walk back to the left onto the seventh platform to reach the "EXIT" sign and put an end to the level.
Level 55 (PITGB: 45)
Once the red Tiny has appeared on the screen, you will have to jump up to collect three coins, and switch to the green Tiny; once you have done so, you will have to latch onto the underside of a platform above you with the grappling hook, and use it to swing over a pool of toxic waste. You will then have to drop down to two more platforms in turn, jump up to a fourth platform, use that grappling hook to latch onto the underside of a pipe above you and swing up to that first platform, and walk back to the left to collect three coins and a key (while watching out for two wall-climbing Tinies) - and once you've done it, you will have to switch to the yellow Tiny. You'll now have to jump up and shoot three fireballs at the second wall-climbing Tiny (while watching out for the projectiles he is firing at you) to kill him; once you have done it you shall have to walk back to the right, jump up and shoot three more fireballs at the first wall-climbing Tiny (while again watching out for the projectiles he's firing at you) to kill him. You will then have to switch back to the green Tiny - and once you've done so, you will have to latch onto the underside of another pipe above you with the grappling hook and use it to collect seven more coins. You will then have to use the grappling hook to latch onto the underside of the first pipe again, swing up to a fifth platform, and push against a brick with a keyhole in it (it'll slide down); once you have done so you shall have to drop down onto a sixth platform and switch to the blue Tiny. You will then have to walk to the right (while watching for three waterfalls of toxic waste), jump up and collect four more coins, continue walking to the right (while watching for three more waterfalls of toxic waste), jump up to collect two more coins in turn, and switch back to the red Tiny - and once you've done so, you shall have to make the Tiny eat through two blocks underneath him to drop down to the ground and walk to the left to enter a teleporter to be warped over to the left side of a chain. You shall now have to walk back to the left and collect five more coins (a block on the underside of the sixth platform above you shall also fall down to the ground at this point), and jump back to the left over the now-fallen block in order to reach the "EXIT" sign and finish the level.
Level 56 (PITGB: 46)
Once the red Tiny has reappeared on the screen, you'll immediately have to switch to the green one; once you have done so, you will have to drop down to the ground, walk to the right, jump onto a handcart as it rolls back into view from the right side of the screen, jump up to the first and second steps of a platform in turn, use that grappling hook to latch onto the underside of another platform above you and swing up to a third one (while watching for a wall-climbing Tiny), jump to the left onto three crates in turn, and drop down to the left onto a fourth crate to collect a clock for 30 extra seconds. You will then have to retrace your steps over to the right side of the first crate, pull it back to the right with the grappling hook to reveal a key, and jump back to the left over it to collect the key - and once you have done so you will have to jump back to the right over the first crate, push it back to the left, jump back to the right onto the second platform (while watching out for a projectile-firing cannon on the underside of a conveyor belt above you) and push against a brick with a keyhole in it (it will slide upwards). You will now have to continue walking to the right and reach the "EXIT" sign in order to put an end to the level.
Level 57 (PITGB: 47)
Once the green Tiny has reappeared on the screen, you will have to latch onto the underside of a platform above you with the grappling hook, and swing to the left up to another platform (while watching out for a crate-dropping Tiny); once you've done so, you shall have to switch to the yellow Tiny. You will then have to turn back to the right and shoot three fireballs at the crate-dropping Tiny to kill him - and once you've done so, the crate that he dropped off the edge of the platform will drop back down onto it behind you. You'll then have to switch back to that green Tiny; once you have done so, you will have to jump to the left onto a wall-mounted lamp to collect three coins, drop back down to the right to that second platform and the ground in turn, and switch to the red Tiny. You will now have to walk to the left onto a spring to be propelled into the air, make the Tiny eat through four blocks in the wall to his left, and drop down to the left onto a third platform - and once you have done so you will have to switch back to the green Tiny. You will then have to use the grappling hook to latch onto the underside of that second platform above you, swing to the left up to a fourth platform, and walk back to the left to collect a key; once you have done so, you will have to jump back to the right onto a fifth platform and push against a cage (its door will slide to the right, freeing a female Tiny who shall drop down to the fourth platform). You'll now have to drop back down onto that fourth platform yourself and push against a brick with a keyhole in it (it shall slide to the left and the female Tiny will escape through the gap it has left behind) - and once you have done so you will have to drop back down to the ground and switch back to the yellow Tiny. You will now have to turn back to the left and shoot five fireballs at two more crates to destroy them; once you've done it, you shall have to jump to the left over the spring, walk down a slope, and shoot a fireball at another crate-throwing Tiny to kill him (freeing a second female Tiny). You shall then have to jump to the left over the second female Tiny onto the "EXIT" sign to end the level.
Level 58 (PITGB: 48)
Once the yellow Tiny has reappeared on the screen, you will immediately have to switch to the green one; once you have done so, you will have to latch onto a hook on the underside of a conveyor belt above you with the grappling hook in order to be carried over a pool of acid, drop back onto that starting platform and a second one in turn, jump back left onto the second step of that second platform, fall back down to the left onto its third step, and fall back down to the left onto a third platform (as you do it, a cage shall fall down from the underside of the starting platform above you, so you will have to move to the right through a green-Tiny-deactivating colour field before it lands on you). You'll then have to jump onto the second step of the third platform and switch to the blue Tiny - and once you have done so, you shall have to jump onto four more platforms (the fourth, fifth, and sixth of which are positioned over a spike pit) in turn, drop down onto a pipe, walk back to the left onto a ninth platform (while watching out for an air current from that pipe below you for it might carry you up to one of three teleporters, along with another cage that will fall down from the underside of the fourth platform above you), and switch to the red Tiny - and once you've done so, you'll have to make that red Tiny eat through twelve blocks underneath him, drop down to the ground, walk to the right, and switch back to the yellow Tiny. You will then have to shoot three fireballs at four cannonballs as they fall down from the underside of the ninth platform above you to destroy them before they transform into large projectile-firing Tinies; once you do so you must reach the "EXIT" sign.
Level 59 (PITGB: 49)
Once the yellow Tiny has reappeared on the screen, you shall have to drop down onto the second step of the starting platform to collect two coins, jump over to the fourth step of the platform to collect three more coins, jump back to the left onto its third and second steps in turn, shoot a fireball at a pipe to your left to blast a hole in it (it shall start leaking, causing the area below it to start filling with water) and switch to the blue Tiny. Once the water from the leaking pipe has completely filled the area below the starting platform, the block between its third and fourth steps will fall down to another platform, and you will have to drop into the water, swim to the left, swim downwards, and swim to the right (while blowing bubbles at an octopus) - and once you have blown enough bubbles at the octopus to kill him, you'll have to continue swimming downwards and to the left, drop down out of the water to the ground, jump up to collect four more coins, continue walking to the right as another block on the underside of a third platform above you falls to the ground, and switch to the green Tiny. You will then have to jump back to the left onto the block, use the grappling hook to latch onto four wall-mounted lamps in turn (while watching out for third block on the underside of a fourth platform above you as it falls to the ground), latch onto the undersides of the third, fourth and second platforms with the grappling hook in turn, swing up to the third platform, and jump to the right onto the "EXIT" sign in order to end the level.
Level 60 (PITGB: 50)
Once that green Tiny has reappeared on the screen, you will have to latch onto the underside of a platform above you with that grappling hook, swing up to it and switch to that blue Tiny; once you have done so, you shall have to jump onto a handcart as it rolls back to the right, jump up into a pool of water, swim to the left and upwards onto another platform, jump up to its second step, and switch to the yellow Tiny. You shall then have to jump over a pool of toxic waste onto the third step of the platform, drop down onto its fourth one, jump up to its fifth one and over another pit of toxic waste onto its sixth one in turn (collecting a coin as you do so) and switch to the red Tiny - and once you have done so, you will have to jump up to two more platforms in turn to collect four more coins, jump up and make the red Tiny eat through five blocks in the wall to his left, drop back down onto the eighth platform, and jump over a pipe (to collect a 1UP). You'll now have to jump back to the right onto the pipe and up to a ninth platform, jump over two groups of spikes and up to the second step of the platform in turn and switch back to the yellow Tiny; once you have done so, you will have to jump back to the left up to a tenth platform to collect ten more coins (while watching out for a projectile-firing cannon on the underside of a conveyor belt above you as its bullets shall kill the Tiny if they should hit him), jump back to the left onto an eleventh platform and reach the world's last "EXIT" sign in order to put an end to the level.
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The game shall then return to the overworld map, as the line of dots indicating the Tinies' progress continues to appear, and they go on to the seventh world; in the Game Boy reskin, this world is only the sixth one on account of how the fifth one was skipped over in it, and it is also the penultimate one.