Super Mario Galaxy 3

Mushroom: The remembered item that gives the player extra health on his journey.

1-Up Shroom: The mushroom that gives the player an extra life.

Golden Shroom: The mushroom that gives the player 3 extra lives.

Mini-Shroom: The mushroom that makes the player really small.

Booshroom: The mushroom that can grant the player the ability of a Boo Buddy.

Metashroom: The mushroom that can make the player metal and not take any damage when touched by fire.

Gear Shroom: The mushroom that can make the player act like a gear and roll around destroying things and acting like a gear.

Fire Flower: The flower that gives temporary fire power to the player.

Ice Flower: The flower that gives temporary ice power and running on water to the player.

Lava Flower: The flower that allows the player to walk through lava temporarily.

Super Leaf: The leaf that allows to player flight until hurt.

Super Hammer: The hammer that the player can hold until thrown at something that can be killed or destroyed.

E.Wand: Made by E.Gadd, the E.Wand can give the player limited magical power like a magikoopa.

Helmet: The helmet can give the player air while under water.

Space Star: Grants the player invincibility temporarily.

Rosalina's Wand: The most powerful item in the Universe. Most of its abilities are unknown.

Player Power-Ups

Mario

Red Star: Grants Mario limited flight time.

F.L.U.D.D.V.2: Returning, the Fludd improved by E.Gadd, can now spray water and suck in certain enemies for coins.

Luigi

Cosmic Shroom: Grants Luigi the ability to call upon the Cosmos to defeat certain enemies for other items and for paths.

F.L.U.D.D.V.2: Returning, the Fludd improved by E.Gadd, can now spray water and suck in certain enemies for coins.

Peach

Frying Pan: Can act like a hammer but can be used until hurt. Using it to smack enemies left and right. And through doors.

Peach Shroom: Grants Peach the ability to repel enemies and stun them as well as jump higher and float without using her parasol.

Toad

Brigade Shroom: When eaten it can call other Toads from the Starship to come and aid Toad by attacking near by enemies and show hidden paths.

Turnip Bomb: Grants Toad the ability to throw an explosive Turnip that blows up into more turnips hitting anything they touch.