I have several favorite Pokemon. My List is huge, but here goes!
Happiny, Bonsly, Ditto, Piplup, Cyndaquil, Chikorita, Tropius, Lunatone, Solrock, Natu, Luvdisc, Mime Jr, Mudkip, Cherubi, Silcoon, Beautifly, Caterpie, Butterfree, Nincada, Chimchar, Cherrim, Wailord, Skitty, Munchlax, Seedot, Squirtle, Charmander, Bulbasaur, Torchic, Lapras, Drifblim, Combee, Chansey, Blissey, Totodile, Bellossom, Oddish, Vileplume, Cubone...
I have many more, but I'm not one to go overboard.