Mega Man shoots a Black Hole Bomb from Mega Man 9. After shooting, the bomb will detonate and create a black hole after a set distance, but can be detonated prematurely by pressing the special move button or if the bomb touches another player, causing 1%. Pressing the button again will instantly force the bomb to suck the opponent(s), dealing 2%. If anyone touches the black hole, they will be sucked in. The black hole itself also causes Flame damage to those pulled in. A cutscene then occurs where Mega Man summons Mega Men from other Mega Man series. All five proceed to charge their respective Busters and fire energy beams at the opponent, causing 37% damage. It reliably KOs at roughly 58%.
The four Mega Man incarnations used, aside from the classic initiator, are:
The move is activated by using the Black Hole Bomb, the weapon gained by defeating Galaxy Man in Mega Man 9. Upon using it, a small dimensional bomb would appear, and pressing the fire button again would detonate it. It would trap small and medium-sized enemies and defeat them instantly. Large enemies would receive heavy damage each time they passed by the black hole. Before detonating it, it could be controlled up and down using the d-pad. In SSB4, pressing the special button detonates the bomb, but it cannot be directed up or down. It also traps opponents in the bomb, just like it does with smaller enemies in Mega Man 9.
In Ultimate, two other characters join the animation:
For Mega Man's Final Smash, he teams up with all-stars X, MegaMan Volnutt, MegaMan.EXE, and Star Force Mega Man, and they fire their Mega Busters in unison. The Black Hole Bomb fired at the start draws enemies in, and as long as that hits, the Mega Busters will follow. Make your foes see stars!