Difficult, I would have to say Aggron, Whenever I am playing a Gen III game, I get genuinely giddy when I finally evolve Lairon and get this total defense tank.

good question
well i prefer charizard
charizard is the best fire pokemon and it has mega evolution
the x and y
anyway i have 1000+ but charizard is the best to me.
and also charizard is friendly weird not dragon type.
fire/flying.

That's a tough one but I'm between Eevee and Charizard, because Eevee has so many
evolutions, but I've always liked Charizard since he's a fire dragon, but I guess my favorite
pokemon would have to be Charizard.

My favorite Pokemon is a tie between Riolu and Eevee.

iop50 :  In my opinion, Suicune is my favorite. It is a legendary, but that isn't my reason. My reason is, is because Suicune is a Water type, which I love water/ice and I'm interested in marine life and other water-related things. My favorite color is blue, and Suicune in my opinion looks amazing.

My Favorite Pokémon is definitely Lugia. Has been since the second movie for some reason I felt a lot of emotion during that movie.  Lugia is just so majestic in my eyes and while I understand it has a very simple design to me it doesn't matter. In fact it makes it look that much better.

I'm going to be a little cheesy here but my favorite Pokemon will and will always be Pikachu. I even own my own Pikachu pillow

I just adore bug types ^-^

They are just my favorate pokes...

Galvantula,larvista and hiracross...

That is my pick (:

Ho oh man that Pokémon is awesome really I love him she was on of my best Pokémon in my team

I love so many Pokémon, so I'll just list my favorite ones from each generation and why.
Gengar (Insanely fast and powerful ghost)Scizor (Bug/Steel with a cool red design)Blaziken (Design and theme is also cool)Giratina (Can't get any cooler with Ghost/Dragon)Ferrothorn (My #1 favorite, has helped me win countless online battles)Aegislash (Love swords, also love ghosts possessing swords)

My favorite Pokémon has got to be Charmander, he (she even), is just so cute. Plus what is not to love about fighting with fire? xD

Mine is a tie between two Pokemon I like equally it is Riolu and Eevee. I like Riolu because he is cool and evolves into Lucario which is even cooler. The reason I like Eevee is because of how it has so much potential due to it having so many evolutions plus it is just so adorable :3

I gotta say Cyndaquil, because hes so cute <3

Since I first started to enjoy Pokémon when I was a little kid, my favorite has always been Vulpix. I loved how beautiful and powerful it was in the anime's first  episodes. I envied Brock so much! Its evolved form Ninetales is great, also. 

When it comes my favorite to use in games, I would say all the fire type starters. I love fire types like Charizard and Blazakin; they always pack a nice punch.  (I'm an offense kind of girl when it comes to video games.)

I decided to split it into Regular and Legendary.

Regular Mon: Empoleon for the simple fact that he's the coolest Water starter in my opinion.

Legendary: Zygarde, cause it's an awesome looking legendary,

I don't think I have any one favourite, to be honest? I've always loved Eevee, and then Sylveon came along and became my favourite Eeveelution (Seriously. Sailor Moon cat-fox. I could not ask for anything more), but those are not my only 'most liked' pokemon. 

I'm also a HUGE fan of Noivern, to the point that I specifically breed dragons on Flight Rising that mimic their colours and body style. I just hatched my first nest and the triplets in it turned out to be perfect little Noibat babies. 

I'm also one of those 'weirdos' who ADORE Mudkip, though my favourite of the line is Swampert. They're such big goofy axlotl babies that are powerhouses if you train them right. 

Piplup and Fennekin are tied on my 'I love these' list...though out of all the starters, Bulbasaur is my absolute favourite and nothing will ever change that. I adore my little poison dino-frog. Ivysaur is my fave of that particular line, but you can't really have Ivysaur without Bulbasaur, now can you?

I also love Sableye, Banette, and Gengar. Most people don't seem to like those three for some reason? I'm not really sure why. Sableye is a cute little gremlin, and the animation they have in ORAS  (and their mega evo) just makes them that much MORE cute to me, like they're all hyped up on caffeine and trying to be shy at the same time. Plus they are little BEASTS when you train them up properly. Same with Banette and Gengar. I get why they're scary, yeah, but they're more cute than frightening to me. Banette is a plushie and just needs someone to love it, and Gengar is a GIANT BEANBAG CAT, I MEAN COME ON. It also happens to be taller than I am in real life, so I really would like a real one. I imagine they're squishy and fun to cuddle with on top of being master battlers. Though the same could be said of Espurr, another favourite of mine that people seem to think is incredibly creepy. Why? It's jut a kitten who doesn't really want to destroy things so it keeps its ears curled. What is creepy about that?

Legendary-wise, I guess my favourite is Jirachi. Mew has to take second place, sadly, and Mewtwo third, though the Mewtwo Y is an adorable little OP monster. Jirachi is just so powerful. I have a level 100 one that has been with me for a long time, and 'she' just murders everything. She has since level 50, if that tells you anything. 

LIke I said, I don't think I could choose between them. There's too many I love, and I've been into pokemon for so long that by this point, I would feel like I was neglecting them if I only chose one to be my favourite. 

My favorite Pokémon is either Snorlax,Eevee or Diglett I don't no why I like these Pokemon I just do.

I have a LOT of likes, and a few favourites, so I'll do it by gen.

Gen 1: Vulpix, Parasect, Venonat, Diglett, Psyduck, Growlithe, Arcanine, Farfetch'd, Doduo, Eevee, Vaporeon, Jolteon, Flareon, Lapras, Articuno.
Favourite = Lapras

Gen 2: Cyndaquil, Totodile, Furret, Chinchou, Togepi, Natu, Ampharos, Bellosson, Hoppip, Jumpluff, Sunkern, Wooper, Espeon, Umbreon, Shuckle, Hitmontop, Lugia.
Favourite = Wooper

Gen 3: Treeko, Torchic, Mudkip, Dustox, Lotad, Gardevoir, Shedinja, Whismur, Skitty, Mawile, Manectric, Plusle, Minun, Wailmer, Wailord, Spoink, Spinda, Swalbu, Altaria, Lileep, Milotic, Castform, Snorunt, Spheal, Kyogre.
Favourite = Mudkip, or Snorunt.

Gen 4: Piplup, Luxray, Combee, Vepsiquen, Cherrim, Lopunny, Lucario, Carnivine, Abomasnow, Togekiss, Leafeon, Glacion, Rotom, Dialga, Cresselia.
Favourite = Cherrim.

Gen 5: Snivy, Serperior, Oshawott, Dewott, Samurott, Victini, Audino, Swadloon, Leavanny, Cottonee, Whimsicott, Petalil, Lilligant, Dwebble, Cofagrigus, Zorua, Zoroark, Minccino, Cinccino, Gothorita, Gothitelle, Vanillite, Deerling, Frillish, Jellicent, Joltik, Elgyem, Litwick, Chandelure, Cryogonal, Rufflet, Braviary, Larvesta, Volcarona, Keldeo, Meloetta.
Favourite = Audino, Lilligant and Cryogonal.

Gen 6: Fennekin, Froakie, Greninja, Bunnelby, Fletchling, Vivillon, Pyroar, Florges, Skiddo, Espurr, Aromatisse, Swirlix, Slurpuff, Amaura, Aurorus, Sylveon, Dedenne, Carbink, Kelfki, Phantump, Pumpkaboo, Bergmite, Avalugg, Noibat, Noivern, Xerneas, Zygarde, Diance.
Favourite = Vivillon, Espurr, Noivern and Sylveon.

I'm done now XD

My favorite Pokémon by far is eevee.  the fact that she can change into so many different Pokémon.  Your entire lot of Pokémon you carry can by eevee evolutions

Yeah charizard is the best in my opinion. I never like the others that much, but charizard is the bomb.