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.