What's your best pokemon eva? and why? You should pick 2-6 pokemons 1 pokemon is not allowed ... 
My best pokemon is Absol .. His strong , fast and the best of all dark types
                                        Flygon is the second because he has a good type combination and a good look

Ghost.Busters : mine are darkrai because he can put pkmn to sheep then beat them. 2 is infernape because he learns the best moves and he's fire type.

One of my many best Pokémon's to in a Pokémon game now-a-days is my combo of Gastrodon and Marcargo. I don't know why but I just like these slug Pokémon for some reason. I feel they make a good team. With Gastrodon's Storm Drain Marcargo wont be affected by water attacks at all unless it is surf, muddy water .. Etc . My Marcargo would always have protect just in case of earthquakes and spammed rock slides. Gastrodon wont need protect because mine can eat earthquakes and rock slides ... This team works really well when Trick Room is in play since they are both slugs, very slow speed.

I could keep going but my post might sound too nerdy and would be too long haha

Luxray is my all time favorate. Its an electric lion whats awesomer then that?...nothing.. Plus its moves are great.  my second fav would have to be the event riakou from game stop. Its a shiny and its moves are awesome. My third fav would have to be umbreon(or espeon depending on the gender.) umbreon is just a great dark type. It can learn really great moves. And its freaking adorable. (espeon is alright. It has some good moves too and its adorable as well)  I also like houndoom. Its a dark and fire type. Two great types so awesomer move sets. I guess my fav starter would have to be employ. I just don't want to have to work to get it. It sucks getting the finial evo of the starters. It takes forever. But I like other starters too. By region mostly. (charzard, swampert, typlotion (im growing attached to feraligator atm thou), employ, and what ever the finnal evo of snivy is.. (first grass starter. Loll )) fav legendary would probly be dialga. Roar of time is just beast. It looks like a beast. And it is a beast. (its closely followed by lugia tho <3)I know its more then six but... still c: it all depends on the situation im in.

Mine first have to be venasaur because he learn good moves and have stats that is great for it type. The second one have to be Umbreon, because it is a tank when it come to taking damage, and it is also an eevee evolution.

I only have one "best" Pokemon. And that's Umbreon. I have a female Umbreon that I have nicknamed "Starla" in one of my games. She sort of moves from game-to-game as I trade her around as soon as I get the chance. I had actually evolved her too quickly to learn bite so my best friend re-added the move to her using Gameshark before he gave her back to me. He thinks he /might/ have EVed her some but he says he's not sure. However, she can stand her own against other EVed Pokemon. Which is really cool. I tend to use her more offensively than defensively.

Just to meet your "rule"... I guess the next one would have to be Espeon because of Colosseum. An Umbreon/Espeon team is pretty epic. And really useful in Colloseum.

1 Arceus: The reason he is number 1 is because he is GOD!!! Of Pokémon
2 Spiritomb: Matched with the WiFi Event Wonder Guard, he can't die just about, except for Toxic.

Competitively speaking my best pokemon was my walling peliper
Rain dish+Aqua ring+left overs+protect+scald+stock pile
That thing was a freaking tank it took a wild charge from a E-vire for god sake(Only lost 40%)
Then burning a poke to cut their attack aswell as stall them...its glorious

My best team would be blaziken-megakick-bravebird.closcombat-blast burn and gengar-hypnosis-dream eater-nightmare-shadow ball

   The best Pokémon for me has to be Blastoise!  It is, in my opinion, the best starter out of the final evolved forms in Kanto. I personally have my own Blastoise on Pokémon Fire Red and I must say, It is unstoppable! Blastoise can dominate any opponent it faces with these four TM moves. Hydro Cannon, an elemental Hyper Beam, which is a very useful attack for finishing off another Pokémon. Blizzard, an ice move that can just destroy grass types and dragon types such as Dragonite. Surf, a very accurate move that is also very powerful. And Earthquake, a ground move with a 100 accuracy rate and 100 attack strength. 
   
   If you can get these moves and give them to Blastoise, you will be unstoppable! P.S. I would give Blastoise quick claw as well.

My best pokemon and favorite is none other than typhlosion, He's the pokemon i can always count on. For a pokemon with plenty weaknesses i can use him against any pokemon and win. I teach him moves you wouldn't expect him to have and he still have moves he has learned.

My best pokemon to use is Typhlosion and Dialga they never fail me and they are my two top favorite pokemon of all times and thats never going to change. I can always rely on them to beat somebody.

My best is jolteon its speed is really good so this is my strategy first use toxic then use dubble team 6 times (it cant be more) then just use thunder and so the whole time further

Blastoise I can't explain it but out of all the Pokémon I work best with blastoise

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i would say... ether Rayquaza or deoxes

My three favorite Pokemon would be Rayquaza, Torterra, and Gardevoir. because they have been with me the longest and I keep transferring them to the newest games, they are also in peak condition (level 100 and nearly all Ribbons).

All of the fire starter pokemon ara good but bliziken is my favourite