I'm having trouble with one of the [i]Let's Go[/i] challenges on the system, apparently, I without realizing it took the Dome Fossil on both and I cannot for the life of me find another Helix Fossil in Cerulean Cave to get a Let's Go Omanyte to evolve. I alo cannot get the trade evos from there as no one I knew personally got the game so I had to rely on [i]Go[/i] to get them.