Okay well, what if any characters from Fullmetal Alchemist got stuck in a Super Smash Bros kind of situation where they had to battle eachother until one was thrown off the stage. Kind of in a way where Super Smash Bros Brawl starts and Kirby and Mario are battling in a stadium and the crowd is watching? Very similar to that. You can be anyone form FMA or Nintendo or both at the same time.
My only rule is that once you pic someone, you stick with them until the battle is over and/or the Role Play dies..then we can think of new ideas! Ermmm I CALL SAMUS!!!!!!!!