Instead of a Pokemon, it’s Candice, the 7th DPPt gym leader of Snowpoint city. She’s the only female Ice type gym leader.
I started off with Candice because I cosplayed as her. I also built her team (rebattle team in Platinum), which had the same abilities and movesets as in the game, and battled people at anime conventions. Her team held up better than I thought, for an Ice team with only 5 Pokemon. Later, for a different convention, I adjusted her team; added Walrein for a 6th Pokemon, added held items, and changed the moveset a bit (especially Weavile’s), and I only lost twice.