Ran on Dolphin Emulator 2412. Difficulty is shown at the end of the battle.

Elektra is the best choice. Her super air attack is really the only thing that can easily launch the opponent over the walls. Thing is still the punching bag of this category since he likes to use his super attack, leaving him open to be popped up. It's hard to be consistent due to potential camera angles on the pop up and if you get too close to him. In which he'll throw his quicker 1-2 attack.