Super Monkey Ball: Banana Blitz Cheats - Wii
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Unlock Grandpa
To unlock the new character named Grandpa, simply get a "complete" status on every stage in the game. To get a comple status, collect all bananas and hidden bananas as well.
Unlock Staff Credits game
Simply beat the first World to unlock the Staff Credits game under the Options menu.
Unlock Worlds 9 and 10
World 09 - Complete Worlds 1-8 without continuing.
World 10 - Complete World 9 without continuing.
Super Monkeys
If you beat worlds 1-10 without using a continue, one of your monkeys will have some extra acceleration. The effects are small though.
Super AiAi - Beat worlds 1-10 using AiAi only
Super Baby - Beat worlds 1-10 using Baby only
Super Docter - Beat worlds 1-10 using Docter only
Super GonGon - Beat worlds 1-10 using GonGon only
Super MiMi - Beat worlds 1-10 using MiMi only
Super YanYan - Beat worlds 1-10 using YanYan only
Unlock Baby Robo
To unlock the minigame version of Baby for use in the main game, play each minigame at least once. If you've forgotten which games you've already tried, the game displays a play count on each minigame. After playing each minigame once, you need to play one more minigame of your choice so that the game will save your stats. Baby Robo will now be available in the main game. Note that to select Baby Robo, you have to highlight Baby on the character select screen and press [1].