Withdraw

Withdraw is Squirtle's Side Special Move. Only seen in a screenshot, it appears that Squirtle goes inside its shell and speeds across the stage, powered by a jet of water shooting out the back of its shell. It appears technically similar to Yoshi's Egg Roll.

Origins

Withdraw is a move in the Pokémon games learnable by shelled Pokémon that raises their defense by withdrawing into their shells.

External Links

Confirmation