Foster's Home for Imaginary Friends (2004)

S5E7 The Bride to Beat

Bloo feels the pressure to mature when he mistakenly believes that Mac is about to get married. Determined to prove his adulthood, Bloo embarks on a series of comical misadventures as he tries to navigate the challenges of growing up. As he struggles with his insecurities, he learns valuable lessons about friendship and the importance of being true to oneself. Meanwhile, Mac is caught in the middle, trying to clarify the misunderstanding while supporting Bloo through his antics.