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I used a Gentle Aurorus in my first Y playthrough an Tyrantrum in my X since I was happy with Aurorus in game.
I've used fossil Pokémon in every gen, Lileep, Anorith, Archen and Rampardos I used in my first playthroughs.
I hope fossil park is a thing since I'd love to be able to catch some of those Pokémon a lot easier with their hidden abilities.
