I'll get a page for myself going now, might make it fancier later.
Ultimate Monotype Challenge (Ground):
Yellow - Nidoqueen, Nidoking, and Dugtrio
SoulSilver - Sandslash, Nidoking, Golem, Quagsire, Steelix, and Mamoswine
Emerald - Swampert, Camerupt, Claydol, and Flygon
Platinum - Gastrodon...