Grinnade (Full Picture)
is one of the trappable villains in Skylanders: Trap Team. A Fire element trap is required to trap him.

Grinnade appears in the Operation: Troll Rocket Steal level, it stayed in one Trolls' Weapons Lab where the Skylanders met its. Grinnade is a walking bomb, and it explodes when it concerns someone.

Anyway the Skylanders defeat him and lock him in a Fire element trap.