He looks to me like a Bullmark mini, but I can't find him in Hyper Hobby Dash 6 or on Club Tokyo. I can't read the foot stamp either.
This guy! A monsta from Ultraman Leo named Antales アンタレス . Your toy is a Bullmark repro from Tsuburaya Productions (before the name change to Yamanaya). I forget which set he came with, but I'm sure someone will chime in with a snap of the OG sack. EDIT: Damn, slowsies.... High five, @djkemp! Davids FTW.