You can find artworks for characters', boxarts for Super Smash Bros. Maximum! here.
Some of the boxarts that are used or removed.
The Beta North American Boxart, featuring (Left to Right) Captain Falcon, Goku, Mario, Sonic, and Kirby.
The second version of the North American Boxart, featuring Sonic, Goku, Light, Kirby, Link, Mario, and Mega Man.
The 3DS cartridge for SSBM!
The DS Cartridge for SSBM!
The final boxart (North American version) of the game. The boxart features Mario, Kirby, Link, Sonic, Goku, Fox, Shadow and Vegeta.
These are the artworks' for all the characters' (exluding DLC's).
Mario's official artwork for Super Smash Bros. Maximum!