So A Magikarp Walks Into A Bar...

[Drgons90]

And Headbutts the hell out of everone.

So Latias and Latios walk into a bar....

 

[Necrum]

and suddenly realize this is a one Pokemon joke, argue over who gets to stay, and eventually have a major falling out, resulting in the break up of their heavy metal band: Eons.

So a Swalot slides into a bar...

 

[何贤豪]

And gobbles up all the Berries and runs away, 'cause everyone was like bringing pitchforks and torches and running towards him like an angry mob. xD

So...a Houndoom walks into a bar...and...

 

[Rothometapratis]

...barks. Then it barks again.
After that a Rhyhorn walks into...

 

[Synerjee]

...a bar, and hits his horn on the bar's hard iron surface, causing it to chip. :P The Rhyhorn then rages and destroys everything around him.

Then, an Eelektross shimmies into a bar....

 

[TheBigMan0706]

and brags to all of the other electric pokemon in the bar that he can't get knocked out by ground types, thus getting him thrown out of the bar.

Then, a snivy walks into a bar

 

[TheCrimson102]

And crushes the fully healed squirtle. by accident of course.
So a uxie floats into the bar.

 

[Dragon-T]

....and erases the memory of it being there.
so a gallade walks into the bar....

 

[darkpokeball]

...and walks out as a Gardevoir, being very confused.

So a Magikarp walks into an Abra walking into a bar...

 

[Dragon-T]

and gets teleported to another bar. so a charizard walks into a bar.....

 

[Elements1]

and see's ash and uses flamethrower on ash for abandoning him (that was lame)

a Caterpie walks into a bar

 

[ShinyUmbreon189]

And get's eaten by a Pidgeot.

A Tepig walks into a bar.

 

[CourageHound]

and helps with the preperation of roast, remoraid, and corphish.

So a Muk walks into a bar...

 

[何贤豪]

And runs 'cause everyone suddenly ran too. xD

So...a Cinccino walks into a bar...and...

 

[Necrum]

...and looked totally fabulous! Haters be hatin'!

So a wild zubat appeared in a bar...

 

[Rothometapratis]

...and that's all.
So, an aron walked in...

 

[Drgons90]

A bar, and joins a heavy metal band(if you know what I mean)

So Cofagrigus floats to a bar...

 

[theanhvn]

An Cofagrigus makes everybody comes to where it is.
So Mewtwo went into a bar.

 

[何贤豪]

And suddenly runs with his immense speed, 'cause he stole a drink! xD

So...an Arceus walks into a bar...and...

 

[Synerjee]

...and creates a new brew called 'The Pokemon World'.

Then, Giratina glides into a bar...