that's a cool idea, but i would refrain from using Krav Maga, because it's linked to the israely army, which is currently involved in a genocide.

I think it would just be variations of the same style they learned. Leo—classic, balanced, surgical. Ralph—offense heavy, aggressive. Mikey—acrobatic, flashy, quick. Donny—grounded, slow, defensive.

This is based on exposure to characters in comics, 1990 film, and earlier TV adaptations.