Lewis Galoob Toys, founded in 1957, was probably most famous for Micro Machines and the Game Genie, with the latter's NES version getting them [https://en.wikipedia.org/wiki/Lewis_Galoob_Toys,_Inc._v._Nintendo_of_America,_Inc. hauled into court] by Nintendo (a case the Big N lost).
Acquired by Hasbro in 1998.