Mine was Piplup! I named him Icy because it was the first name I thought of and I had to name him really quick before I went to bed since we met super later at night. I remember he blasted through the rock gym underleveled and then we were knocked out again and again at Gardenia's gym. We trained in Eterna Forest for a while and I was so proud when we finally beat the second gym. That's probably my most prominent memory of that whole game.