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Cuộc Phiêu Lưu Grim của Billy & Mandy - Season 4 Episode 9 (2007)
When Billy goes into the mud for the fifth time in the day while wearing his white tuxedo before a wedding, Grim tries to figure out why Billy is so stupid. Billy's dad recounts Billy's life from his birth until he met Mandy and explains that Billy is not dumb, but actually a genius with a certified "Honorary Genius Degree". It is quite evident to Grim that Billy's problem is his equally dumb father.
- Quốc gia : United States of America
- Thể loại : Animation, Comedy, Kids
- Studio : Cartoon Network
- Giám đốc : Maxwell Atoms
- Diễn viên : Greg Eagles, Richard Steven Horvitz, Grey DeLisle, Vanessa Marshall
