AKA Raichu was a mid evo at some point
https://nintendoeverything.com/pokemon-designers-talk-pikachu-why-it-was-a-rare-character-in-game-canned-evolution-called-gorochu-more/>Nishida: Yes. It was “Pika(chu),” “Rai(chu),” and “Goro(chu).” The Pokémon known as Gorochu bared fangs and even had a pair of horns.>Sugimori: There wasn’t any problem with its appearances, but it was omitted due to matters surrounding game balance.