The first pokemon I ever got to 100 was a Feraligatr. But he's gone now... On my LeafGreen I have lv. 100 Venusaur, Charizard, Blastoise, Nidoking, Arcanine, Ninetales, Scyther, Jolteon, Aerodactyl, Moltres, Zapdos, Articuno, Mewtwo, Typhlosion, Tyranitar, Sceptile, Swampert, Blaziken, Metagross, Rayquaza, Registeel, Latios, and 2 Latias'. So 24 I guess.