Everybody has a favorite Pokémon/Evolutionary line. Who’s yours, and why?

Mine has to be Totodile! I love the whole evolutionary line, but Totodile is hands-down my favorite Pokémon. My first ever Pokémon games was a copy of Pokémon Gold with a broken internal battery; it couldn’t store save data. On long road trips, my sister and I would pack the GameBoy Colour and Pokémon Gold. We would pass the GameBoy back and forth between stops, getting as far as we could before we had to turn off the GameBoy. Whenever we inevitably had to restart and pick our starter again, Totodile was always my choice. I’ve got lots of great memories from that game, even if we could never save our progress.

Who’s your favorite Pokémon, and what’s the story behind it? First starter, clutch battler, best design?