Mega Legends

Mega Legends (, Rockman Special) is Mega Man's Final Smash.

Overview
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 it 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%.

In Super Smash Bros. Ultimate, in addition to the aforementioned versions of Mega Man, the attack also features Proto Man and Bass.

Origin
The four Mega Man incarnations used, aside from the classic initiator, are: In Ultimate, two other characters join the animation:
 *  from Mega Man X
 * MegaMan.EXE from Mega Man Battle Network
 * MegaMan Volnutt from Mega Man Legends
 * Star Force Mega Man from Mega Man Star Force
 * Proto Man from Mega Man 3 onwards
 * Bass from Mega Man 7 onwards

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 Smash, 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.

Trivia

 * Opponents with more than 390% damage may escape this Final Smash, due to the bomb's explosion causing slight knockback. However, this may be avoided by forcing the bomb to instantly suck in the opponent.
 * If the move is used entirely over the upper blast line, a glitch will occur. As the opponent will take knockback from the bomb, they will be instantly KO'd. However, the game considers the opponent still "trapped" and they will still be in the Final Smash, resulting in getting KO'd a second time.
 * Usually, Mega Man uses his left arm to fire his energy beam. However, if the "Backwards Glitch" is performed when Mega Man is facing right, he'll use his right arm instead.
 * Black Hole Bomb is the only Mega Man weapon in Mega Man's moveset to originate from the digital Mega Man games (9 and 10).
 * The game will slightly lag when viewing the Mega Legends trophy in Smash for Wii U. This is likely due to the amount of detail put into the trophy.
 * Mega Legends is one of few Final Smashes with characters appearing as cameo appearances along with Pair Up, All-Out Attack, Chain Attack, Team Star Fox, Team Star Wolf, PK Starstorm, Gigaslash, ARMS Rush, Burning Sword, and Sacred Arrow.
 * Additionally, Mega Legends and Chain Attack are the only Final Smashes to return from Smash 4 which feature new characters added into Ultimate&mdash;in this case, Proto Man and Bass.