Oh geesh. I have many. @_@; I'll do like... top five for each region or something.
Kanto: Bulbasaur, Dragonair, Beedrill, Vaporeon, and Sandslash
Johto: Totodile, Bellossom, Ampharos, Espeon, and Lanturn
Hoenn: Flygon, Absol, Mudkip, Chimecho, Altaria
Sinnoh: Cherrim, Lumineon, Chingling
Yeah. I don't like many of the Sinnoh Pokemon. :x Most of my favorites come from the first two generations, which if I posted more than five, there would prolly be like... ten or something. XD;