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puberty stages are pretty shit, and he's a trade pokemon so I can imagine players were forced to use him if they couldn't find someone to trade with, or traded him off to receive golem.
the other gen 1 trade pokemon all had exposure in the show, and were much better designs in terms of tying 3 pokemon altogether (machoke was a buffer machop, haunter was a half developed gengar and kaDABra was one spoon away from alakazam)
