Now, now. Porting (if you can even call it that) an original MK game (1-3) down to the GB, SMS/GG, and Game.com was/is far cheaper and requires far less of a team and resources than taking a game meant to play on a 360/PS3 and dumb it down to Wii specs.
Who said the Wii sucks at fighting games??? I played Mortal Kombat: Armageddon on my neighbor's Wii and I thought it only sucked a little bit.