Favorite Pokemon from Each Region

Post your favorite Pokemon of each region (Kanto, Johto, Hoenn, et al)! You can list more than one.

Sylvia PixelMiette

 * Kanto (Gen. 1): basically all the original 151 pokemon!! They're good!!
 * Johto (Gen. 2): Sneasel
 * Hoenn (Gen. 3): Mawile
 * Sinnoh (Gen. 4): Cresselia
 * Unova (Gen. 5): the Elemental Monkeys (Pansear, Panpour, Pansage), Leavanny, Vanilluxe
 * Kalos (Gen. 6): Chespin, Meowstic, the Honedge evolution line
 * Alola (Gen. 7): Popplio, Mimikyu