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At a school fair, Grim's scythe accidentally transforms the dull Principal Goodvibes and his hippopotamus into gangster rappers, Goodvibes now calling himself Principal Goodbling. In the following, Goodbling changes the entire school to be more hip-hop-oriented, to the annoyance of Mandy. Although initially Grim likes the new style of the school principal, he later thinks Goodbling is just a poseur and goes to talk to him, but Goodbling attacks with yo-mama jokes. Irwin's grandmother, Tanya, confronts Goodbling and proves to be better than he is at yo-mama jokes that Goodbling reverts to being the boring Goodvibes.
Ngày phát sóng đầu tiên : Aug 24, 2001
Ngày phát sóng cuối cùng : Nov 09, 2007
Tập phim : 184 Tập phim
Mùa : 7 Mùa
Thời gian chạy: 11:7 phút
Studio: Cartoon Network
Quốc gia: United States of America
