Normal - Snorlax

Fire - Arcanine

Water - Starmie

Electric - Magnezone

Grass - Meganium

Ice - Lapras or Glaceon

Fighting - Heracross

Poison - Weezing

Ground - Rhyperior

Flying - Dragonite or Togekiss

Psychic - Musharna

Bug - Heracross

Rock - Tyranitar

Ghost - Dusknoir

Dragon - Dragonite. You probably think salamence is the best, but dragonite has better defenses and a slightly better attack.

Dark - Tyranitar or Umbreon

Steel - Skarmory or Magnezone

You mean based on usability in battle? Or the pokemon I just think are the coolest?

The best in battle

20 chars

Normal - Arceus

Fire - Reshiram

Water - Kyogre

Electric - Zekrom

Grass - Shaymin-Sky Forme

Ice - Arceus

Fighting - Arceus

Poison - Arceus

Ground - Groudon

Flying - Rayquaza

Psychic - Mewtwo

Bug - Arceus

Rock - Arceus

Ghost - Arceus

Dragon - Rayquaza

Dark - Darkrai

Steel - Dialga

arceus would technically go in all of those, as it has all of it's stats maxed out.

Arceus has 120 in all of its base stats. Some of the other Pokemon have a better distribution.