It wasn't SpinMaster Esk, it was some dude with the idea that took it to SpinMaster, and then from there, he and Spinmaster brought it to Sega and they produced it together. And then everything took off after that.As for the dude, Eclipse could be right, but I never knew that dude's name. XD
Spinmaster used his idea, but Bakugan in itself was made by Spinmaster/Sega. They made all the copyrights and stuff.They just used another guy's idea, but that's not Bakugan, as it is note trademarked by that guy.