>>42286767Pokemon that got Pre-Evolutions
> Clefairy, Clefable> Jigglypuff, Wigglytuff> JynxPokemon that got Z-Moves/G-Max Forms
> Machop, Machoke, Machamp> MewPokemon that got specific Items
> Ditto (Metal Powder & Quick Powder)Pokemon that got signature moves Post-Gen I (even if they were later no longer signature)
> Staryu, Starmie (Camouflage)> Moltres (Sky Attack)> Dratini, Dragonair, Dragonite (Outrage)> Growlithe, Arcanine (Extreme Speed)Pokemon that got signature abilities
> Psyduck, Golduck (Cloud Nine)> Shellder, Cloyster (Skill Link)From that I'd say the Pokemon that should really be looked at are:
Spearow, Fearow, Ekans, Arbok, Nidoran F, Nidorina, Nidoqueen, Nidoran M, Nidorino, Nidoking, Paras, Parasect, Venonat, Venomoth, Mankey Primeape, Bellsprout, Weepinbell, Victreebel, Tentacool, Tentacruel, Doduo, Dodrio, Seel, Dewgong, Drowzee, Hypno, Voltorb, Electrode, Goldeen, Seaking, Tauros, Omanyte, Omastar, Kabuto, Kabutops, Articuno, Zapdos