My all time favorite is Typhlosion. My first level 100 ever. :)
Whimsicott and Goullurk
Smart enough to use forth in the wrong context
Claims: Metagross and Travis Touchdown
I've always been a fan of Chimecho, but I fear recent events have found me head over heels for Sylveon.
I liked Victini when I first saw it on that trailer for the Pokémon Black and Pokémon White Version Events.
Absol. Interesting backstory, good design, and good stats. Plus, Dark is my favorite type.
I have to say, though, if Generation VI was included here I'd have to check Heliolisk as well. That thing's my favorite Electric type of all time.
My top favorite Pokemon is Espeon. It has such a beautiful, adorable design while being simple and not over the top...it's got great skills in battle, too. I also happen to love cats.
My other favorites are Gengar, Roserade, Bisharp, and all the other Eeveelutions. I haven't decided on my favorite XY Pokemon yet...but it's most likely between Florges and Aegislash!