Pruslas is a giant chubby purple reptile monster that wields a massive club in a similar fashion of Atlas. Though Pruslas at first may seem like a recolor of Baalzack and the Night Clubbers, it is proven by the Dragon Quest Monsters: Joker series to be way bigger.
This creature does not fight fair: when encountered in his tower he will trick the hero/heroine to look in the middle of the room for a gift in recognition of he/she making it so far. But the moment he or she turns his/her back at him, the monster will attack by surprise and the battle will start with the monster getting the first turn. To avoid this the hero/heroine must speak with the monster again without turning back. It reappears in Dragon Quest X, first as a boss, and then as a normal enemy by 3.5 onwards, with its reappearance in Dragon Quest XI reprising the role of a normal enemy. In Dragon Quest Heroes II, he appears as one of Fractos's lackeys guarding the Black Manse and battling the Heroes, after using a Disruptive Wave to rid them of their buffs. He fights as the other bosses do, but when he reaches half heath, he says the party deserves a "reward", which is him stomping the ground 3 times. He is defeated and is not seen again, though more of him are seen in the Seven Realms after Fractos, and by extension, the game, is defeated.