The Rocketbarrel Boost is Diddy Kong's Up B move. The distance the Rocketbarrel Boost will cover depends on how much the player charges the jet pack. The player can change the direction that Diddy travels with the jetpack by tilting the control stick while the move is being charged. The move is similar to Firefox. When used in the air with the foe right under the barrels it may serve as a meteor smash, spiking the foe while you recover to safe ground. If Diddy is attacked while using the Rocketbarrel Boost, the barrels will fly off and become a projectile. When fully charged, it holds the record for best recovery, tieing with Sonic's Spring Jump and Wario's fully charged Wario Waft.
|Diddy Kong's Special Moves|
|Standard Special||Peanut Popgun|
|Side Special||Monkey Flip|
|Up Special||Rocketbarrel Boost|
|Down Special||Banana Peel|
|Final Smash||Rocketbarrel Barrage||Hyper Rocket Barrel|