Foster's Home for Imaginary Friends (2004)

S4E13 Good Wilt Hunting (2)

Feeling neglected at the yearly picnic, Wilt decides to leave in search of his maker. Concerned for their friend, Bloo and the others embark on a journey to bring him back. As they search for Wilt, they uncover surprising revelations about his hidden history, revealing layers to his character that no one expected.