I am Christina Aguilera
Member
It's been said online for years and years that Taito lost the original arcade source code for Bubble Bobble. However, I've noticed a bunch of similarities between the WiiWare Bubble Bobble Plus release and this x68000 version, from specific verbiage in the settings to slight physics differences with the arcade version. Maybe they didn't have the arcade source code, but the source code to the x68000 version might have been a useful/accurate enough stand-in for Taito?