The fourth tier of Big Finish requires you to KO 100 characters using a hyper combo.
Save enough meter for a hyper combo and when your opponent is low on health, use a hyper combo to finish them off. In Marvel vs Capcom, each character you KO counts towards the challenge, so you can potentially get 2 per match in MVC.
A hyper combo is the most damaging and most spectacular attack a character has. They require 1 hyper meter to perform. They’re typically done by inputting a motion on the joystick+ or buttons. For example, Ryu’s hyper fireball beam is done by inputting +. View the inputs for your characters hyper combos by viewing their movelist.
This achievement can be stacked with “Hyper Artist” and “Powers Combined.”