My first legit Lv 100 was back in Hoenn. It was Ruby or Emerald. It was Glalie or Pikachu. I don't remember which one it was. Those were my first 2 100s I got to 100 legitly. I also had a lv 100 swampert, but my cousin used a AR for rare candies on that one. Those were my favorite pokemon at the time. Glalie was before Ash caught a Snorunt in the anime though.