Awabō

King Bubble is an optional boss found in Wario Land II. He resides inside the remains of an ancient town that has been burried at the bottom of the ocean. King Bubble appears like a small and unintimidating creature normally, but he can inflate himself, causing him to triple in size and adopt a malicious grin. Wario has a chance to meet him if the players manage to sink the SS Tea Cup during the second chapter. The Black Sugar Pirates who have stolen Wario's possessions will then flee into the ruins. Their leader, Captain Syrup is unlucky enough to become King Bubble's prisoner.

Wario encounters King Bubble in the optional level Captured Syrup! after traversing the level area leading to his chamber. When he enters the chamber, he will see Captain Syrup enclosed in a bubble, slowly flying upwards. King Bubble will then appear anc challenge Wario. The treasure hunter needs to jump King Bubble's head three times to defeat him and clear the level. After each hit, the boss will create a duplicate of himself, trying to confuse Wario. If Wario touches the enemy, King Bubble will trap him and transport him to the top of the room. The battle has to be restarted if this happens. After Wario wins the battle, he will effortlessly defeat Captain Syrup and get his treasures back.