Gum-Gum Rocket

Gum-Gum Rocket is 's side special move in Super Smash Flash 2.

Overview
When performed, Luffy quickly thrusts both of his arms a great distance forward, even greater than that of Gum-Gum Pistol. If his hands come into contact with an opponent, he will grab them and then pull himself towards them at high speeds, slamming into them and dealing 10% of damage with weak upward knockback.

The move can also be used as a tether grab when connecting with a ledge to aid Luffy's recovery. However, it's also risky to use off-stage due to its high amount of ending lag.

Origin
Gum-Gum Rocket is a frequent technique used in One Piece as Luffy's main method of traveling long distances fast. Much like he does in SSF2, he stretches out one of his arms or both and grabs a handhold, then retracts them, projecting himself high into the air at high speeds, over great distances, or even into an opponent. This was first developed when Luffy was a child, along with Ace and Sabo, battling against the king of Mt. Colubo, a giant tiger; Ace gave this attack its name. This technique is often times reckless especially if not done properly as Luffy could accidentally propel himself into a body of water or worse. Indeed, Luffy has little to no control after launching himself, being unable to change directions in mid-flight, and is only able to (barely) decelerate before landing. This was first seen being used to propel Luffy to the top of the Marine Base in Shells Town in the manga. In the anime, it was first seen being used to crash into Alvida's crew. This technique is also capable of landing devastating attacks against larger opponents as shown against Dorry. A humorous usage of this "attack" was accidentally against Ace and Smoker in a restaurant, who are both Logia users but did not have the reflex to counter the charge.