My favorite non-legendary Pokémon is pikachu, particularly Ash's Pikachu, and my favorite legendary Pokémon is kyogre.  I like Pikachu because he was Ash's very first Pokémon and they've been together ever since.  I got choked up when Ash thought it was best to leave pikachu with the other pikachu in the original series and when Pikachu cried when Ah turned to stone in the first movie.  I like Kyogre because it resembles a killer whale, it can control the oceans and rain, cause torrential downpours, and it has the cool move Origin Pulse in Omega Ruby and Alpha Sapphire.

I can't remember if I've posted in this thread before, but I'll go ahead and post anyway.
I've always loved Pikachu, and that will never change. I've also like just about any dragon type, most of the starters, and a few others here and there. Marill might be in second place to Pikachu though. When I was a kid, I had a huge Marill pillow, so that may be part of the reason why. I also like how blue he is, and my favorite color has always been blue.

Bulbasaur.

For some reason, everyone just kind of neglects him, and I don't really know why. Sure, the other two starter Pokémon are very good, but Bulbasaur isn't terrible... Which is pretty much why, every time I revisit Gen 1 I pick Bulbasaur. I feel kind of bad for him. I also had gotten Bulbasaur when I revisited PMD: Explorers of Time a while ago, so since then I kind of became "attached" to it.

I also like Pigeot. I also became attached to this Pokémon when I was doing a nuzlocke of Gen 1 and caught Pidgey in the first route. I kept and evolved that Pidgey all the way, and went out of my way to make sure it wouldn't faint. (Well, it was a nuzlocke after all...)

There are so many Pokemon out there, and they all have their great qualities.  However, since I'm only to pick one, I'd have to go with Treecko, since he's the starter that started me on my first Pokemon adventure in the classic Pokemon Emerald.  Not only are his moves useful in many situations, but his evolutions add to the effectiveness of the other many moves he can learn.  Personally, as a starting trainer, I didn't even think of who to pick: Mudkip, Treecko, or Torchic?  When I picked Treecko, I didn't even realize how important he would be.  The first gym I went to, I didn't know what I was going into.  But when I started battling, it felt almost natural getting the hang of type advantages.  I don't mean to be dramatic, but it's just what my mind is telling me to type.  That's my answer.  My favorite Pokemon is Treecko.

My favorite Pokémon has shifted around as I played the games and new ones came out. My first was Chikorita, cause that thing is just so darn cute! Nowadays, I'd say my favorite Pokémon is Braixen though. 

My favorite Pokémon would probably be Gyarados, Dragonite, or Aerodactyl. I think it's probably fairly obvious that I have a thing for dragon types, XD. They were always looked amazing to me, and Elite Four Leader Lance was the coolest to me due to that.

Mine would be bulbasaur as well. I had a thing for that pokemon when I was young when playing pokemon yellow. I dunno why I think because of when I was watching the anime at the time I liked how bulbasaur was portrayed when I first saw him. I didn't have much love for squrtle or charmander back then. I mean I loved and like them as well. But not as much as I loved bulbasuar. So I guess I am happy with how I stuck with him most people would had gone for either charmander or squrtle for starter picks. Because they were more cooler than bulbasuar. But for me bulbarsaur was just perfect.

Sylveon for me. They really outdid themselves with the design of that Pokemon and not to mention it's surprisingly one of my strongest Pokemon in my Y game. I really love it, though I haven't played the game in forever haha.

I don't know why but its Golduck for me closely followed by Kingler.

1- lucario (design and nothing more, oh and the movie was pretty good too)
2-feraligatr ( my first ever starter)
3- venusaur (the starter of the first game i ever completed )

Squirt le and his evolutions are easily my favorite. Squirlte, I feel like, has always been the strongest starting Pokémon and he is just a all around great Pokémon. His sprites are amazing, his attack animations, the damage he does. He is a very well rounded Pokémon.

My favorite Pokémon would have to be Absol. I love their high attack capabilities, as well as being able to learn a huge variety of moves to go with it. Plus, the design is awesome, as well as them being known as the "catastrophe" Pokémon.

I personally like the Alakazam, because Alakazam's special stats are very high and very good. Whenever I'm down to my last Pokemon, it'll be Alakazam. That Pokemon is real life saver for me and helped me on several battles on Wifi battles.

And one other Pokemon for me is Lucario. Because Lucario looks very cool and awesome, he's in two cool games, Pokken tournament and Super Smash. for Wii U and 3DS. 

My favorite Pokémon, since I like Dragon type Pokémon, is Dragonite. I always use it in my team. 

My favorite pokemon is easily Squirtle. Actually I like his second form Wartortle a little better. At this point, he's still an adorable pokemon, but you can tell he means business!

My favorite Pokemon would have to be dragonite. I've got one in every Pokemon game I own and have played. Dragonite is my favorite because of its high stats and because it can learn a large range of diverse type moves, for example with my dragonite's i usually teach it ice beam, flame thrower, thunderbolt and either fly or solar beam or dragon breath or dragon rush or drecor metor. 

 I'd have to say that my most favorite Pokémon of all is Leafeon. I don't know why, but when I first saw Leafeon I just felt this pull towards it. Though I'd put Noivern up there as well, if we were to go by type, since I love Dragon type Pokémon.

If I had to give a favorite Pokémon: it would have to be mienshao for a few reasons. The first reason being that it's a really fast Pokémon so it can come in for the revenge kill if one of your other Pokémon faints. Additionally, it gets regenerator so it can heal off of any damage it takes from life orb and it has synergy with u-turn so you can switch in mienshao on a Pokémon with low hp, and use u-turn so you either kill it then switch mienshao out so your opponent can't kill mienshao or you can use u-turn so you gain switch advantage over your opponent if they decide to switch their Pokémon out. Additionally, high jump kick is a very strong fighting type move that mienshao can use to great effect with either life orb/reckless or choice scarf/reckless or simply life orb/regenerator as it'll do amazing damage. Additionally, since mienshao is faster than a lot of other Pokémon, you can switch mienshao out after one of your Pokémon has died and then click high jump kick, then out speed most other Pokémon to use u-turn to switch out safely the turn after if you are running life orb. Thus, it has good competitive usage.

Additionally, I just like the overall design. The extra flapping portion of it's body combined with its rather slim figure makes it resemble a very fast martial artist, which is why it is a fast fighting type. Additionally, I think it just looks graceful. Lastly, it also looks very frail like it could break with almost any hit, which is also true since it dies to most anything that hits it. In summary, I just think that the design fits it extremely well and I just love the design.

Mine would have to be Absol, a super power Dark Pokemon (mine has 318 power at level 100), and Sawsbuck which is just a really awesome looking Pokemon imo

My favorite pokemon is medicham. It looks absolutely sick, especially in mega form. It's also got access to moves like fake out and zen headbutt. If I had a second, probably ludicolo.