Octopus (オクトパス Okutopasu) is Mr. Game & Watch's Final Smash which is based on the Game & Watch game. Simply put, Mr. G&W transforms into a large octopus, the same colour as the Mr. Game & Watch being played, which float-crawls freely (quite slowly) through the stage. Even though the Octopus appears to float, it still requires terrain in order to move, which results in a self-destruct if it falls off the stage, although it can jump and double-jump a small bit. The Octopus has unlimited swim time, and isn't affected by the current of moving water in stages such as Jungle Japes. The Octopus is also unaffected by the stage hazard such as Klaptrap (on Jungle Japes) and the Fish (on Summit). Out of its eight legs (one of which can't be seen), four of them can extend to about 7 times their length. Normally, only the body will damage the opponents, but if the tentacles are extended then the tips of the tentacles will damage opponents until they withdraw. The tentacles in the back deal less damage than the ones in the front, which can be a problem since the Octopus can't turn around. Touching the G&W Octopus causes 16% of damage. The Final Smash lasts about 17 seconds. Whilst activated, most of the screen fades slightly (causing the screen to somewhat resemble a Game & Watch's white background) and a strange noise is heard. It is interesting to note that the Octopus is not affected by slow motion effects.
 Trophy description
Mr. Game & Watch's Final Smash. He turns into the huge cephalopod that made its debut in the Game & Watch game Octopus. Of course, you can damage enemies by running into them, but you can do more damage by pressing the attack button to extend four arms and launch foes. In the original Octopus game, you had to avoid the octopus while salvaging treasure from the sea.