It's the story of Kabutack, one of ten "B-Robos" created by Dr. Torahiko Koenji. The good doctor discovered the existence of the thirteen Star Pieces, which grant any wish to those who get 'em all. For this reason, Koenji created the B-Robos. But some of the B-Robos aren't very nice and turn against Koenji. So, it's up to the good B-Robos to trounce the bad ones week after week.
Recurring Metal Hero tropes include:
- Humongous Mecha: DodeKabutack, which also changes to a Super Mode version.
- Transforming Mecha: The B-Robos.
B-Robo Kabutack provides examples of the following tropes:
- An Ass-Kicking Christmas: The aptly named The Epic Christmas Battle special, which features Kabutack teaming up with previous Metal Heroes Blue Beet and B-Fighter Kabuto (albeit they are toys brought to life though).
- Awesome, but Impractical / Blessed with Suck: Tentorina has a permanent Super Mode but doesn't have combat abilities and consumes too much energy.
- Crossover: Kabutack teams up with Blue Beet and B-Fighter Kabuto in the aforementioned Christmas Special.
- Dismantled MacGuffin: The Star Pieces.
- "Do It Yourself" Theme Tune: Takeshi Kusao, who voices Kabutack, also sings the opening theme, "Kiyoku Tadashiku Kabutack."
- Goldfish Poop Gang: The "evil" B-Robos.
- Gotta Catch 'Em All: The Star Pieces, again.
- Hour of Power: The B-Robos can only stay in Super Mode for a matter of minutes. Sharkler, one of the evil B-Robos, can stay in Super Mode for 15 minutes, the longest for any B-Robo.
- The only one who has a permanent Super Mode is Tentorina, but it consumes too much energy and has completely no combat ability other than having a combat stick, which may or may not be very useful at all.
- Lighter and Softer: To the entire Metal Heroes franchise.
- Red Boxing Gloves: Ganiran the horseshoe crab has huge, round red claws to invoke this trope.
- The Smurfette Principle: The sole female B-Robo, Tentorina the ladybug, cannot transform due to having the Super Mode on permanent.
- Super-Deformed: The standard mode of the B-Robos.
- Super Mode: Their super robot alternate modes are literally called Super Mode. Even the aforementioned DodeKabutack has one too!
- Super Prototype: Subverted. Despite him being the titular protagonist, Kabutack's Super Mode lasts three minutes, the shortest of any of the B-Robos.
- That Syncing Feeling: Episode 36 features the B-Robos in a singing contest judged by Captain Tonborg. During the bad B-Robos' song, Gerotan realizes something's not right, and confronts them from back stage. Cobrander accidentally reveals the ruse when he talks back to Gerotan, who pulls back the curtain to reveal them lipsynching to none other than Takayuki Miyauchi.