I was think of character that crossover to MLP:FIM universe and I don't know "fight" with each other.
Anyway who would you think would win in a battle?
1. Loki God of Mischief vs. Princess Celestia2. Janemba (from DBZ: Fusion Reborn) vs Discord
3. Mephisto (The Devil in the Marvel Universe) vs Doctor Whooves
4. Guitar Battle: Octavia vs Scott Pilgrim
5. Fastest in the world: Rainbow Dash vs Flash vs Sonic
Give me facts why the pony win the battle.