So a Castform walks into a bar...

[Adam Levine]

... and asks for the bar's "most child-friendly" drink.

A Shuckle struggles to move to a bar...

 

[illumine]

...and gets stolen to enliven the bar, but has no PP to use Flash. A Shuckle using Struggle probably looks a bit like a Magikarp using Splash, so it is sent off to Nigeria to send people e-mails bugging them.

So a conspicuous Misdreavus drifts into a bar...

 

[PageEmp]

And spooks out a Caterpie in the bar.

The Caterpie runs out, make sure the ghost is no longer in the bar, and walks back into the bar...

 

[Sun]

And it evolved into a Metapod!
So then a Spheal rolls into the bar...

 

[illumine]

...and gets grumpy, sending Team Rocket blasting off again. Remembering that it is a Spheal, it then recites the New Testament backwards.

So a Dodrio wanders flightily into a bar...

 

[Adam Levine]

...and notices the Metapod from earlier. As the circle of life goes, Doduo eats the Metapod.

A Lampent floats into a bar...

 

[Adam Levine]

...

...anyway, a Lampent enters the bar...

 

[PageEmp]

And microwaves the bar.

A Cobalion scurries into the bar...

 

[Sun]

and he fights with Terrakion!
So then a Keldeo hops into the bar after hearing the fight...

 

[Sirfetch’d]

...and calls upon Terrakion!

so then Virizion walks into a bar...

 

[Sun]

... and he whistles at the Virizion, who's staring at the bar entrance!
so then that same Virizion walks into the bar...

 

[Sirfetch’d]

...and the Swords of Justice have a party!

So then Kyurem walks into a bar...

 

[Sun]

...and it uses the move Glaciate to create a disco ball!
So then a Zekrom called Nah walks into a bar...

 

[PageEmp]

And starts dancing, and accidentally hits his head on the bar as he tripped on something. This caused electricity to come out of him and the sparks made the party brighter than it ever was. am i doing this right

A Reshiram saw this and flew into the bar...

 

[FireSnow]

...and decides to join in, using its fire attacks to act as barbecue of sorts. Hope the patrons like their food extra crispy!

Seeing this amazing party occur, Meloetta floats on in to the bar...

 

[PageEmp]

And starts singing for everyone.

A Genesect saw the party and so entered the bar...

 

[Adam Levine]

...and creates a laser light show with Techno Blast!

So Landorus in his Therian Forme walks into the bar, hearing there was a party...

 

[PageEmp]

And he started throwing mud at evryone on the dance floor.

Thundurus saw this and flew into the bar...

 

[Adam Levine]

...and said, "What the heck? You don't do this when we're around."

So Tornadus follows Thundurus into the bar...

 

[illumine]

...and mocks the Thundurus by claiming that it's basically a Pikachu and it cannot clip the wings of bird-type Pokémon.

So a Steelix walks cautiously into a bar...