My Torterra from Pokemon Pearl!
It was my first Pokemon, and the first Pokemon to become a fully evolved starter! It also helped me defeat Crasher Wake quite easily :D
Another Pokemon with a special place in my heart is my Floatzel. He is the one who defeated Cynthia's Roserade! I was really worried because I thought I was screwed, but Floatzel managed to keep together, and he won.
The last Pokemon with a very special place in my heart is Reddin, my Charizard. In Battle Revolution, whenever there is a tough opponent that has managed to take out my other Pokemon, Reddin is the one that is always the last one standing, and also is one that makes a comeback.