Mega Man Powered Up Cheats - PSP
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Unlock Megaman C
You must complete Normal Mode in New Style.
Unlock Boss Title Screen
You must beat any boss with mega buster, and then load him as character.
Unlock Roll
Download from Capcom's Website.
Unlock Robot Masters
Beat them in new-style mode using only the Mega/Rock Buster.
Unlock Protoman
You can unlock Protoman (also known as Blues) as a playable character. To do so, complete all one hundred in-game Challenges. Or, download him from Capcom's website.
Unlock Roll Versions
There are many, many versions of Roll that can be acquired (such as Summer Roll, Knight Roll, Ninja Roll, and more). You can download any of them by hitting up Capcom's website with your PSP.
Unlock Mega Man S
To download Mega Man S (who has the ability to slide), beat all of the stages on Easy Mode.
Destroying Special Attacks
Unlike in the original NES release of Mega Man, each Robot Master has their normal attack which mimics the original, and special attacks that are new to the game. These special attacks seem unavoidable, but you can actually stop them from executing these attacks by finding the attack's corresponding weakness. For instance, you can use the Rolling Cutter on Bomb Man's special attack, the Hyper Bombs on Ice Man's special attack, and the Ice Slasher on Fire Man's special attack.