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A third of the original 151 are just animals or animals but x variant.
Squirtle line, Caterpie line, Kakuna and Beedrill, Pidgey line, Ratata line, Spearow line, snakE backwards line, Sandshrew line, Zubat line, Venomoth, Meowth line, Psyduck, Mankey line, Growlithe line, Tentacool line, Ponyta line, Farfetch'd, Seel line, Shellder line, Krabby line, Horsea line, Goldeen line, Tauros, Omanyte line. Kabutops line, Aerodactyl and the legendary birds.
Anyone who defends the creativity of early gens is biased. No I am not defending newer gens or their designs as they have the same shit going on.