Wide Load...
Some characters don't quite fit into smaller karts, like Wario... He has a tough time squeezing his ass into the Toad kart.

Tiny Toys...
Bowser's a big boy who doesn't fit nicely into a tiny little Kart... He's so big, that his body actually hovers over top of the Kart instead of riding in it.

Big Little Guys...
Even though smaller characters can fit into bigger karts, the game normally doesn't allow you to select a bigger kart unless you've chosen at least one heavyweight character... But with this code activated, the little guys can take a big ride out for a spin.

Fast Finish...
Although Mario isn't huge enough to completely overflow while riding in the Para Wing, he's still too big to fit in the drivers' seat.

Barely Fits...
From this angle, Donkey Kong doesn't look too bad riding on the back of Mario's kart. I think he migh still be hovering in the air a little bit.

Get on the Train...
Here's Waluigi driving Diddy Kong's Barrel Train. Waluigi isn't a heavyweight, but he's quite tall... I have found that his legs look absolutely huge when he's riding on the back of a small kart, but his legs are just a bit too big to fit properly.

All Aboard...
Peach hangs onto the back of the Barrel Train. Although she's fairly small, she's still just a bit too tall for this ride. Still though, it makes an interesting screenshot.

Rising Above...
As was mentioned above with Bowser, the big heavyweights actually hover in the air when they're riding on the back of small karts. This neat snapshot of Wario shows a huge gap between him and the backseat.

Big Beast...
In this rear-view screenshot, the Bullet Basher looks absolutely tiny underneath Bowser's massive body. I sure hope he doesn't break this little toy...

Wide Turns...
DK is in the drivers' seat of Mario's racer. Because the kart is sliding in this shot, you can notice just how far ahead DK is, as he's too big to properly fit in this kart.