for those that don't know this song, here's some excerpts of its wikipedia article: yatta is a 2001 parody song by the fictional japanese boy band green leaves. the song was first performed as a sketch on the japanese sketch comedy show adventures of a laughing dog, known as silly go lucky in the united states, where happatai is portrayed by some of japan's most well-known comedians. characters: poppun, ponta, draluc, howdy, vampire bananya, togepi, and jack frost.
all characters belong to their respective owners(takara tomy, tomoki misato, itaru bonnoki, ritsuko kawai, gathering, nintendo, and atlus). the song also belongs to pony canyon and was written by hideki fujisawa/dance man.
