Wally Warbles is a formidable bird boss in Cuphead, appearing in the game’s second island, Inkwell Isle Two. He serves as the main antagonist in the level Aviary Action!, which is an intense airplane-based stage where players must take to the skies to defeat him. As one of the many challenging bosses in the game, Wally Warbles provides a unique and thrilling experience for players. He has an array of dangerous and unpredictable attacks, ranging from summoning explosive eggs to releasing a barrage of feathers. His distinct appearance—being a large, irritable bird—coupled with his high-pitched voice, makes him one of the more memorable and eccentric bosses in the game. Throughout the battle, Wally Warbles undergoes multiple phases, changing his form and attack patterns to increase the difficulty. In his second phase, he sheds his feathers and becomes even more aggressive, using his remaining avian body to attack. As with other airplane levels, players must be skilled in dodging and mastering their aircraft’s controls to defeat him. Wally Warbles' playful yet ruthless behavior makes him an exciting and unpredictable foe, fitting well within the game's art style and retro animation, which mimics the look of 1930s cartoons. His level, Aviary Action!, features vibrant skies and dynamic background elements, further enhancing the challenge and immersive feel of this airborne encounter.