Similar to 'set 1', this version features a Z80 sound CPU, but the 'set 2' designation indicates a further refinement or revision. The differences between set 1 and set 2 remain undocumented, but likely involve minor alterations to the game's sound. Further research is needed to discover the original developer and release information.

Pipi & Bibis / Whoopee!! (Z80 sound cpu, set 2)

Pipi & Bibis / Whoopee!! (prototype)