Octopus

Mr. Game & Watch's Final Smash is based off of the Game & Watch game "Octopus". Simply, G&W transforms into a large octopus that float-crawls freely (quite slowly) through the stage. He can also jump slightly. Out of its eight legs (2 of which can't be seen), three of them can extend to about 7 times their length. Touching the G&W Octopus causes 16% of damage. It is unknown how how the Final Smash lasts.