Mr. Game & Watch (SSBB)/Up smash
Mr. Game & Watch performs a powerful headbutt while wearing a diving helmet. The move has two fairly large hitboxes, one which is attached to Mr. Game & Watch's head and another static hitbox which floats above him. The move provides intangibility to Mr. Game & Watch's head while the hitboxes are out making it a decent anti-air. The biggest weakness of the move is its high startup lag not coming out until frame 24. However, the move has very low ending lag only having 10 frames of cooldown. When combined with its high pushback on shield, this makes the move practically safe on shield requiring the player to shield SDI in order to punish it (assuming they are not pushed off an edge). The move is only -8 on shield (-4 if hit on the last possible frame), making it extremely safe for a smash attack. Its low ending lag also means that the move is difficult to whiff punish, allowing Mr. Game & Watch to either throw out another move or to defend himself. The move is the third strongest up smash in the game; being able to KO the entire cast under 100%. Charging it at ledge as a get-up read or simply as a mixup can get even earlier KOs.
It is overall one of the best up smashes in the game due to its excellent KO power as well as its difficulty to intercept and punish making it an excellent move to use when Mr. Game & Watch's opponent is at a high percent.