The Rocketbarrel Boost (Japanese: Barrel Jet - バレルジェット, Bareru Jetto; labeled Rocketbarrel Blast in the Brawl instruction booklet) is Diddy Kong's Up Special Move. Diddy Kong activates his Rocketbarrel Pack and propels himself upwards.
The height the Rocketbarrel Boost will cover depends on how much the player charges the jetpack. The player can change the angle that Diddy travels by tilting the control stick left or right while the move is being charged; charging the move longer allows a more significant angle shift. Diddy falls slightly slower as the move is charging.
Touching an opponent while ascending will cause minor damage. The initial burst when used in the air may serve as a meteor smash, spiking the foe while Diddy recovers to safe ground. If Diddy is attacked while using the move, the barrels will fly off and become randomly-moving, unshieldable projectiles, exploding on contact with the stage. If Diddy hits a ceiling while using the move, he takes about 5% damage.
|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|
Rocketbarrel Attack hits harder than the Rocketbarrel Boost, but doesn't fly quite as well.
Rocketbarrel Kaboom charges faster and steers better, but the Rocketbarrels explode when he hits terrain.
|Diddy Kong's Custom Special Moves|
|Custom 1||Custom 2|
|Standard Special||Exploding Popgun||Jumbo Peanuts|
|Side Special||Back Flip||Flying Monkey Flip|
|Up Special||Rocketbarrel Attack||Rocketbarrel Kaboom|
|Down Special||Shocking Banana Peel||Battering Banana Peel|
The Rocketbarrel Pack is a jet pack that Diddy Kong uses for Rocketbarrel Barrage and Rocketbarrel Boost.
- An item that looks like regular barrels but becomes a rocket-powered jet pack when Diddy Kong straps them on his back. It's a convenient gadget to have when adventuring, but for whatever reason, Diddy also uses it when playing tennis and basketball. The moves he can pull off with the rocketbarrel pack are so cool that they're almost not fair. Almost.
- Donkey Kong 64 (1999)
- Donkey Kong: Barrel Blast (2007)
- When playing as Diddy Kong on "low gravity" mode, charging his Rocketbarrel Boost in the air causes him to float up, as if the gravity was reversed.
- If Diddy Kong is attacked in midair, jumps, and then uses this move, the same thing occurs.