Seeing so many showelware games on Wii, it would be a nice idea to make a SSSW - Super Smash ShowelWare game. I think it would rock, especially with the planetary ninjabread man popularity.

Choose 2 characters you would put in it.

My picks are Ninjabread man and Kung-fu panda(never seen it, but i'm sure it will be on ninjabread man's level) 

This is gonna be hard. I think one of the inherent aspects of shovelware is that they are so bad nobody plays them or even remembers them after passing them at a Gamestop and laughing. The sole exception that proves the rule being Ninjabread Man which has become a cult hit.

The Prince of Persia.

The Guy from the Wii Far Cry.
His Level will have a unique art direction: blurry and horrible color. How charming.

Anubis and the Elvis from Rock'n'Roll Adventures... they could even have the Down Special just like Zelda + Sheik, and guess what? the moves would be the same!! faithful to the games, eh!

 oh, that was one character... I dunno. well, one Mini-Desktop car as assist trophy!

One of the army men from a "sarges heroes" game.
and Slippy Toad [he could be the frontman like Mario is in smash]

The dragon from Lair. It's attacks will consist of plowing headfirst into walls due to shoddy controls.

And now it's time for some screenshots!

 Chicken shoot level, ofcourse.

Ha Ha. Where's the dog from?

John Madden - EA's Madden Series

Giana - Great Giana Sisters