I started playing LeafGreen. Doing some things I never did before. Picked Charmander (picked Bulbasaur in Blue and FireRed, Squirtle in Red). Got a Mankey early to beat Brock and I'm using Spearow instead of Pidgey for my early Flyer. But I also caught a Caterpie, evolved it to Butterfree and it's been a lifesaver against early Poison types like Koffing, Ekans, Grimer, and Zubat you find against NPCs. I wish it could learn a Bug move early to take out Misty's Starmie.