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Now hold on, this raises a big question. What is our metric for being considered "good"? Feraligatr's always been an outstanding Pokemon, even if it isn't the most popular competitive Pokemon. Access to its HA boosted it quite a bit, sure, but we didn't get that until recently.
But then again, Nidoking was the go-to speed running Pokemon in gen 1 since it can solo the entire game with ease. Feraligatr trumps that in gen 2, since it's one of the few Pokemon capable of keeping up with every single gym, and you have it right from the get-go.