|This article is about a/an villain in Kamen Rider Decade.|
Bossroach (ボスローチ Bosurōchi) is one of the Roach enforcers who watch over the human race, whom he sees to be inferior. Bossroach resembles the Caucasus Undead. He controls a small portion of Darkroaches as his personal soldiers. Bossroach is then destroyed by Decade Complete Form using the Kiva Emperor Final Kamen Ride.
- Height: 230 cm
- Weight: 139 kg
- Bossroach is the altered version of the original Beetle Undead costume of Kamen Rider Blade with it's Ouroboros Buckle replaced with the Darkroaches' belt.
- His sword and shield, however, are directly taken from the Causasus Undead.