Super Mario Bros. 3/Items

Super Mushroom
Changes Mario into Super Mario. In this form, he can break bricks. Small Mario cannot.

Raccoon Leaf
Changes Mario into Raccoon Mario. In this form, he can fly, float, or wag a tail to beat an enemy. He can even control the speed of his fall. Small, Super, Hammer, and Fire Marios cannot.

Starman
Allows Mario to kill enemies simply by running through them. He will still lose a life, however, if he falls into a bottomless pit, runs out of time, or gets stuck in an auto-scrolling level.

Warp Whistle
Takes Mario to the Warp Zone, where he can get into a new world. Using it in World 1 will allow Mario to warp to World 2, 3, or 4. Using it in Worlds 2-6 will allow him to warp to World 5, 6, or 7. Using it in World 7 or the Warp Zone itself will allow him to warp to World 8.

P-wing
Makes Mario Raccoon Mario with a constantly-filled meter. The P-wing will last only one level, and then Mario will become regular Raccoon Mario. If he is hit by an enemy, he will become Super Mario (good for the fast auto-scrolling airship in World 8).

Fire Flower
Changes Mario into Fire Mario. In this form, he can throw Fireballs. In World 6, Fire Mario can remove ice from iced coins and Munchers.

Anchor
Use it to keep an airship from moving across the map.

Music Box
Puts Hammer Brothers (or Piranha Plants in World 7) to sleep so Mario can get past them as if they weren't there.

Hammer
Allows Mario to break a rock. (Not to be confused with opening a lock, which can be done by defeating Boom Boom.)

Frog Suit
Changes Mario into Frog Mario. In this form, Mario can swim, which is useful for water levels; on dry land, he can jump higher than normal, but cannot run fast.

Jugem Cloud
Allows Mario to skip a level. Note that if an airship hides where you can't reach it, you will have to complete the level to get to it.

Tanooki Suit
Changes Mario into Tanooki Mario. In this form, you can can do anything Raccoon Mario can do, as well as turn into a statue. To turn into a statue, duck then press while ducking down.

Hammer Suit
Changes Mario into Hammer Mario. In this form he can throw hammers, which are even stronger than fireballs, and the suit itself will protect him from fire attacks if he crouches down. When Hammer Mario crouches down, his back looks like a black koopa's shell. Hammer Mario can destroy nearly any enemy, and Boom Boom takes just one hammer.

Goomba's Shoe
Only available in World 5-3. In order to obtain it, Mario must hit the Goomba wearing it from underneath; any other attack destroys the shoe as well. While wearing it, Mario can jump higher than normal and stomp enemies that would otherwise hurt him on contact (such as Spinys and Piranha Plant), and he can still throw fireballs as well. If hit, he loses the shoe but not his powers; he automatically discards the shoe at the end of 5-3.