third stage made for the series (there's no point in really saying this these were uploaded in the order they were made...which is also the weakness order), not only is this basically Acid Man's stage but it also uses one of Burst Man's original gimmicks, the addition of the balloons were supposed to be a reference to Burst Man's rising bubble attack, Burst Man is weak to Plant Barrier...honestly because there wasn't any other way for the weakness order to go, but maybe it's like how Air Man is weak to Leaf Shield because the leaves clog his fan?? Gameplay wise it also makes his attacks basically useless so it still works as a weakness regardless