My possible team so far:
Tepig, Panpour/Hiyappu, Drillbur/Moguryuu, Joltik/Bachuru, Ferroseed/Tesshiddo, ???
Types covered: fire, fighting, water, ground, steel, electric, bug, steel, grass
Missing: normal, flying, poison, psychic, rock, ice, dragon, ghost, dark
Tepig was my favourite starter...