The Bazooka Goblin was a goblin that wielded a bazooka in Finn and Jake's Tree Fort, as "seen" in the episode "Rainy Day Daydream." When everything that Jake imagined became real, the Bazooka Goblin was created. It was going to blast Finn and Jake, but Finn repeatedly said not to do it. The goblin laughs hysterically for a moment, but he obeys Finn. The Bazooka Goblin's appearance is unknown, as everything Jake imagines is invisible. Only Jake can see it.
HA HA AH HA!!
Eh ehe he . . . okay.