RocketFist

, Roketto āmu, lit. Rocket Arm (ロケットアーム) is Grobyc's Level 3 tech in. Learned upon acquiring 3 boss stars, Grobyc gains the ability to literally release his left arm to deliver a punch to a selected target, dealing fairly heavy damage in the process.

Description
Grobyc will first extend his left arm outward to face the selected target. Grobyc will then place his right hand on his left shoulder, releasing a mechanism which causes his left arm to retract from his body. The camera will then shift its focus onto the target, whereby the retracted arm, encased within a purple-yellow flame due to the high velocity it is travelling at, is observed to ram into said target's body.