It would seem that the trademark list from way back when seems to be completely accurate so far.

Charizard, Blastoise, Gengar, Kangaskhan, Pinsir, Jynx, Gyarados, Aerodactyl, Mewtwo, Ampharos, Scizor, Houndoom, Tyranitar, Heracross, Gardevoir, Absol, Medicham, Banette, Latias, Latios, Aggron, Abomasnow