Heart King is an enemy that appears in Bomberman 64. It is the rarest enemy in the game, appearing seldom at the end of the Doom Castle of Rainbow Palace. It moves at a normal pace, occasionally turning. It will stun Bomberman on collision. Upon its defeat, it will always yield a Heart item.
When Heart King is hit with a thrown Pumped Bomb, it will only be stunned. In Hard Mode, it moves more quickly and takes three bomb blasts to defeat.
- Baku Bomberman Official Guidebook, pg. 77