Likely arena: Waterfall, though anywhere from Undertale would work.
Final Smash: MERCY/FIGHT--all opponents are unable to attack for anywhere from 3 to 10 seconds, but Frisk's attacks do anywhere from double to seven times damage.
Reason: Kind of an accident, agreed out of curiosity. They do enjoy being able to fight without having to worry about killing people.
Frisk | Undertale
Final Smash: MERCY/FIGHT--all opponents are unable to attack for anywhere from 3 to 10 seconds, but Frisk's attacks do anywhere from double to seven times damage.
Reason: Kind of an accident, agreed out of curiosity. They do enjoy being able to fight without having to worry about killing people.