Gen I: Mew
Gen II: Lugia
Gen III: Lombre
Gen IV: Palkia, Electivire
Gen V: Golett and Golurk <--- My babies forever.
4 Darkrai (Even need to ask)
Gen 1 Charizard
Gen 2: Typhlosion
Gen 3: Treecko
Gen 4: Chimchar
Gen 5: Sawk
Gen I: Pikachu
Gen II: Sneasel and Typhlosion
Gen III: Rayquaza
Gen IV: Lucario
Gen V: Zoroark
Gen I: Victreebel
Gen II: Heracross
Gen III: Torkoal
Gen IV: Luxray
Gen V: Samurott
Kanto - Venomoth
Jotho - Ariados/ Houndoom
Hoenn - Seviper/ Sceptile
Unova - Liepard/ Galvantula / Samurrot/ Volcarona
Let's see... it's impossible for me to choose only one from certain Gens so...
Gen I - Blastoise, Arcanine, Psyduck, Alakazam, Snorlax, Dragonite, Mew.
Gen II - Mareep, Entei.
Gen III - Mightyena, Milotic, Walrein.
Gen IV - Torterra, Empoleon, Munchlax, Togekiss.
Gen V - Stoutland.
Genfoor: Munchlax (Gallade comes an extremely close second, though!)
Gensiks (so far): Fennekin (so cliche, I know)
Kanto: Venusaur - Charmeleon, Gengar, Primeape, Dodrio and Moltres.
Johto: Raikou - Miltank, Murkrow, Larvitar and Heracross.
Hoenn: Breloom - Shiftry.
Sinnoh: Infernape - Torterra, Luxray, Honchkrow and Lucario.
Unova: Tornadus - Bisharp, Escavalier, Garbodor, Accelgor, Krookodile, Jellicent and Zoroark.
Gen VI: Froakie... lol
Man this is so hard to choose from so I got 5-14 from each Region sorry if I'm cheating and these are just the regular ones not legendary
Gen I- Bulbasaur, Charizard, Wartortle, Lapras, Flareon, Dratini, Snorlax
Gen II- Totodile, Noctowl, Togepi, Dunsparce, Snubbull
Gen III- Sceptile, Blaziken, Hariyama, Skitty, Torkoal, Flygon, Absol
Gen IV- Torterra, Infernape, Empoleon, Staraptor, Luxray, Glameow, Bonsly, Munchlax, Riolu, Lucario, Drapion, Electivire
Gen V- Snivy, Oshawott, Dewott, Leavanny, Scolipede, Archeops, Zorua, Zoroark, Vanilluxe, Chandelure, Golett, Golurk, Hydreigon, Volcarona
Gen VI- Fennekin, Froakie so far...
Gen I: Meowth
Gen II: Wobbuffet
Gen III: Aggron
Gen IV: Gliscor
Gen V: Vanillite!
Gen I: Growlithe
Gen II: Typhlosion
Gen III: Metagross
Gen IV: Togekiss
Gen V: Excadrill
Gen VI: Fennekin (Out of the ones known)
Gen 1: Scyther
Gen 2: Skarmory
Gen 3: Gardevoir
Gen 4: A tie between Gallade and Froslass
Gen 5: Zorua
Like Confidemus mentioned above, its kind of impossible to choose just one in certain generations, I'll try to keep at a max of 3
out of all the regions combined, #1 is Liepard, rest of the regions....
• Gen.1 - Kanto - Persian is the top Pokemon in the generation, for me no other Pokemon comes near, the top cat of Kanto
• Gen. 2 - Johto - in my opinion Johto had the worst looking Pokemon created, the only one that I sort of like is Furret, not the way done for the anime, but the way how some fans drew it on Deviant Art. My vote for Furret
• Gen. 3 - Hoenn - tie between Delcatty, Linoone, and Zangoose, take my vote for the region, as they are my favorites by design
• Gen. 4 - Sinnoh - Again another tie between Glameow and Buizel. Loved Zoey's Glameow in the Sinnoh contests. I love both designs.
• Gen. 5 - Unova - this is problematic region for choose only 1 or 2 favorites, as Unova has the highest number of my favorite Pokemon, Dewott, Watchog, Patrat, Emolga, Servine, Mienfoo, Purrloin, Pansage, Pansear, Panpour..... but still Liepard is #1 in my heart.
• Gen. 6 - out of the 5 that so far have been introduced, I'm starting to like Chespin. I can't wait to see the rest of the Pokemon for the generation