"I Wanna Take You For A Ride" Song Remix For All Characters
Hold LT + RT before the character selection screen appears.
Play As Galactus In Arcade Mode
Highlight the "Arcade Mode" option at the main menu and press Back + LB + A.
Earn 30,000 points on your player card.
Play As Galactus
If you start a game with a save file from the original Marvel vs Capcom 3, then you will be able to play as Galactus, without having to perform any other tasks to unlock him.
Character Switch Before Fight
During the loading screen before fight, hold either "R" or "L" triggers to change which character starts the fight.
Galactus Arcade Mode
Gain 30000PP and press L+select+X before entering arcade mode.