List of Mario vs. Donkey Kong 2: March of the Minis pre-release and unused content
From the Super Mario Wiki
This is a list of pre-release and unused content for the game Mario vs. Donkey Kong 2: March of the Minis
The setting was always outside on the top screen.
Cool Kongs used to wear spiked helmets, have purple goggles, be darker, and have the "C" on their ties being a "W." The sprite used for the Mini Marios hanging onto a Cool Kong's tie was also different, with the Mini Marios facing forward as he did so.
Hearts were also present instead of big coins (apparently as collectible items).
Shy Guys were dark red instead of red-pink in the final game.
Wall Jump bars were also originally red, being reddish-pink (much as Shy Guys) in the final game. Falling poses were the same as unactivated poses as well.
Additionally, Gold Mini Marios were going to appear in every level.
The game logo was slightly different from the final.