When you start the big bully level star with a rocket boost then when he's at the edge use a mushroom to knock him down.
If you mean by gaining a Mega Mushroom or growing to a large height, you cannot. You are able to in Mario Kart Wii.
giant mushroom
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You defeat the boo by sneaking up on him by the back and hit him.
the only way is to moonjump(hack\cheat)
no, unless you have cheats for that game
Go on the Mii Channel on the Wii home Menu and edit your selected Miis size so that he is quite big and then go back on to Mario kart wii and look at your mii. He or she will be an adult mii.
It is hard for some people because there is no one way to win, hopefully you still think it is fun even if it is hard so if you dont think it is not fun, then get a different game
I last played on 'Mario Kart Wii' about 2 months ago, but from what i can remember, they are them big sliver blocks that float in the air. And when they see you coming, the drop down to try and crush you. They are in alot of maps. For example Bowsers Castle.
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Henry was a big bully .
Depends on the type. If you're talking about the shortform for Super Mario Kart, they either don't sell anymore or are at a flee market. MK64 and MKSS(GBA Mario Kart) have probably the same condition. MKDD(GCN Mario Kart), MKDS, and MKW sell at low cost stores like Gamestop and MKW and MKDS sell at Big stores like Wal-Mart. Not so sure about MKDS though.