The pokemon is...

[Chiyo]

The thing is to say a pokemon is, anything you like. And the next poster says why.

"Pikachu's teeth are green."
"Pikachu didn't brush."
Quite easy. I'll start.
Treeko is mummyfied.

 

[Lord of the Spheal]

Treeko is mummyfied.
Treecko tried to drink embalming fluid

Spheal is ruling the world

 

[NiNGi's Worst Nightmare]

Spheal is ruling the world.
Spheal grew to enormous enormous size, and bullied the world leaders.

Eevee passed out during a party.

 

[IceKitten]

Eevee had too uch vodka

Groudon was practising flower arranging

 

[NiNGi's Worst Nightmare]

Groudon made a bet with Kyogre that involved doing strange things.

Pichu is eating a giant marshmallow.

 

[G-Klav]

Pichu was a Scout member...

Geodude was purple

 

[THIRTY-SIX]

it was holding its breathe

swampert is ultimate pokemon

 

[NiNGi's Worst Nightmare]

Swampert's on steroids.

Jirachi is watching tv.

 

[Lord of the Spheal]

Jirachi is under house arrest

Magikarp is drowning...

 

[~Mewtwo_Rules~]

Magicarp can only splash ._.

Hitmonchan took up kicking

 

[G-Klav]

Hitmonchan broke an arm!

Vulpix is learning to swim

 

[Jirachi3]

vulpix is larning to swim.
vulpix is not to bright

Jirachi is the best ever!

 

[NiNGi's Worst Nightmare]

Jirachi won an Olympic medal.

Gyrados is mad.

 

[Chiyo]

Gyrados was told he couldn't keep his mouth shut.

Pikachu has vanilla up his nose.

 

[IceKitten]

Pikachu sniffed some vanilla ice-cream

Rayquaza went through a keyhole o.O

 

[NiNGi's Worst Nightmare]

Rayquaza found a GIANT keyhole.

Plusle used Water Gun.

 

[~Mewtwo_Rules~]

Plusle swallowed some water at the beach yesterday

Raticate s whiskers are cut off yet it is running faster than normal

 

[AngelWolfie]

Raticate is getting chased by a persian

Charmander took a mud bath.

 

[~Mewtwo_Rules~]

Charmander was a Bulbasaur in disguise.

Charmeleon is frozen

 

[Ninetales1]

Somebody looked at an online Pokedex, and while he was looking up Charmeleon, the computer froze.

Magikarp is green.