To get a profile for a character just play a single player exhibition game and win.
The M.V.P will have his profile unlocked in exhibition records.
In order to unlock the mini-game, "Coin Derby", perform the following task:
To unlock the sectet map, beat every minigame once. The sectet map lets you go through a warp pipe and go to an island which you can play toy field on. You can play it 3 times and it is 10 turns.
Go to challenge mode and choose Yoshi as your captain. Go to Bob-omb Derby (by the Pinita) on easy mode and win. Then, go to the shop. Buy a Power Bat. Then play Peach's team first (the white and pink castle). You should hit continuous homeruns with the Shy Guys. You will later unlock Baby Luigi.
Waluigi.