Super Mario 64/Tiny-Huge Island

Location: Upper floor of castle, through a door with a star on it.

Description: A level much like the first one, with one exception. Mario will be either big if he enters on the left side, small if he enters on the right side, and will switch sizes if he goes through a pipe.

Bob-omb Buddy As big Mario, go to where the cannon is. Your Buddy is there. (Hint: the cannon is on the other side of the wall from where you start, then across all the water.)

Star 1: Pluck The Piranha Flower
Enter the course as big Mario, and long jump twice to the left. Jump in to the pipe and kill all of the piranha flowers as small Mario by attacking them (with the B button)

Star 2: The Tip Top Of The Huge Island
Make your way to the top of the island as small Mario. The star is in a gold ! box. It is easiest to start as big Mario and change to small Mario near the top.

Star 3: Rematch with Koopa the Quick
(its easier if you start out as big Mario) climb up the mountain and go through the tunnel by the boulders coming out once your big go further than where the boulders are coming from and you will see Koopa the Quick and then beat him down the mountain and you will receive a star.

Star 4: Five Itty Bitty Secrets
Find all 5 secret spots when you are the big Mario. One is where the cannon comes out, one by the hole in the mountainside near the cannons (bridge leads to it), one is where the rolling balls come out, and one is at the very top of the mountain. The last one is the small hole in the grey wall where you start, from the side by the beach. The star will appear on the floating island beyond the big/small pipe on the lowest level. Step on the switch and a number of orange boxes will appear which you can walk across to get to the star.

Star 5: Wiggler's Red Coins
As small Mario, launch out of the cannon to the tree up above. Walk across the thin long plank and enter the cave. The coins are inside. (You need to swing across the roof for some.)

Star 6: Make Wiggler Squirm
Go to the top of the mountain as big Mario. Butt slam the ground to make a hole. Go back up as small Mario and enter the hole. Butt slam the worm three times for the star.

Star 7: 100 Coins
When you are small Mario, you can butt-slam the Goombas for a blue coin. There are 15 in all. After that, it's a snap. There are 191 coins in all

Impossible Coin
There is a coin near the bowling ball generator that is underground and impossible to collect. Change views around the generator and you will find it.