Suprr Mario 64 DS Power ups
This page tells you all about the special power ups, and how they give powers to each character. In case you hear the words 'Power Flower', here is what that is:
Mario- Wing Cap
The wing cap, which can be gained by grabbing a feather in a level (similar to a Mario World cape feather), allows Mario to fly around the level in style. You can adjust the height you go by holding up or down, turn using left or right and if you slam down at enemies and slide, you can kill any weak monster. In VS mode, these are avaliable for anyone to catch and use.
Mario- Floating Mario
The Floating Mario ability is a new addition to the game, and is based off of Super Mario World (there you could grab a Power Balloon and float around like you can here). By pressing B, you go upwards using this, and you have full freedom to float around the level until it runs out. Getting hit will turn you back to normal though.
Luigi- Vanish Cap Luigi
This ability, gained from getting a Power Flower as Luigi, allows Luigi to turn half invisible and gain the abilities formely given to Mario with the Vanish Cap in the original game. You can go through any enemy with this item, and also through many kinds of gates and fences simply by running at them. Very useful in many levels.
Wario- Metal Wario
Using the Power Flower, Wario turns to metal and can smash through small enemies, destroying them instantly. Using this, you are immune to all damage by enemies, obstacles, lava, freezing cold water, toxic gas and drowing, and also can smash certain things by running into them. You also sink when in water, making it vital for going through jet streams and strong currents. Same with gale force winds, where you can go through to get to difficult places in the level.
Yoshi- Breathe Fire
This is a bit of an odd ability, as there is not really much point in using it in any actual level. This is because the ability can also be gained, indeed in more limited quantities, by eating fire in the level. Still, with this, Yoshi can kill weak enemies, burn wooden objects, melt tough ice and instantly destroy most snow/ice based enemies.
Mega Mushroom
This is allows any hero (even Yoshi if you can get it with him), to walk around and destroy pretty much anything in a level. Enemies and major obstacles automatically die if you hit them in this form, most objects in levels will even explode or fall over and after eight things have died/blew up, you start getting extra lives for everything you destroy! This was brought back in New Super Mario Bros.
Shell
The shell is a different kind of item, as while you cannot get it from a red block, you can get it from Koopas, and yellow blocks in certain levels. It grants you invincibility from weak enemies, allows you to go up sloped surfaces, allows you to surf lava, icy water and normal water, plus, makes you immune to quicksand. However, hitting a strong obstacle or a stone/brick/metal wall will destroy the shell, so watch out!