Question: what gen 1 pokemon need stones to evolve?
Answer: Pikachu -> Raichu w/ Thunderstone., Nidorina -> Nidoqueen w/ Moon Stone., Nidorino -> Nidoking w/ Moon Stone., Clefairy -> Clefable w/ Moon Stone., Vulpix -> Ninetales w/ Fire Stone., Jigglypuff -> Wigglytuff w/ Moon Stone., Gloom -> Vileplume w/ Leaf Stone., Gloom -> Bellossom w/ Sun Stone.