Giga Bowser Punch

Giga Bowser Punch is Bowser's Final Smash in Super Smash Bros. Ultimate, replacing Giga Bowser from previous games. Upon activation, the background turns into a purple vortex, and Bowser roars as he emits purple energy and transforms into Giga Bowser. Before he grows to full size he warps away, then reappears floating in the center of the background at an enormous size. He is much bigger than Giga Bowser normally is; Masahiro Sakurai compared it to the size of Mega Baby Bowser. Giga Bowser makes a fist, causing a red crosshair to appear over the screen. The bigger the stage is, the bigger the crosshair is. The player can freely move the crosshair across the screen, until a green circle around the crosshair serving as the attack's timer depletes. The crosshair can move across the entire stage, though on the extra large Training stage there are invisible walls to the left and right. If the player presses an attack button or the timer runs out, Giga Bowser will punch at whereever the crosshair is, dealing 40% damage and launching foes heavily. If the opponents hit are at 60% damage, or 80% if using the FS Meter version, the punch will launch them into the screen for an instant Screen KO. After punching, Giga Bowser shrinks down a little, teleports away, then returns to where the Final Smash started as Bowser. The background returns to normal. The attack is overall reminiscent of the Dragoon and Lightning Chariot, other powerful single hit attacks that are aimed using crosshairs.

There exists a coding bug which causes opponents hit with a Giga Bowser Punch that meet the criteria to be instantly Screen KO'd to instead be launched up and off the top of the screen. Oppenents hit in this way pass through any hazards or platforms until they go beyond the top of the screen. This only happens on the following stages: Mushroom Kingdom, Mushroom Kingdom II, WarioWare, Inc., 75m, Mario Bros., Hanenbow, Dream Land GB, Mute City SNES, Balloon Fight, PictoChat 2, Flat Zone X, Wii Fit Studio, PAC-LAND, Super Mario Maker, and Umbra Clock Tower.