|This article is about a/an Villain in Juukou B-Fighter.|
Synthetic Beast Heavyznake (合成獣ヘビーズネーク Hebīsunēku, 2) had a humanoid body with a long snake draped over the head area that serves as its arms.
Heavyznake was dispatched to hunt and capture humans for Jamahl. Taken with the B-Fighters to the Gaohm Zone.
When the B-Fighters blasted and struck the snake, he revealed a second head and pair of arms underneath. Heavyznake was killed by the Beetle Break.
It can blast fire from the snake head on his arm and lasers from its eyes. Heavysnake's second head can blast lasers from its mouth.
- Although Heavyznake was adapted for Big Bad Beetleborgs, his second form was not used as an actual monster in the series. However, its body was repainted and combined with the head of the partially-repainted version of Muscle to form Guirk's alien form in "Space Case".