So a Castform walks into a bar...

[TheLegendaryGuy]

And uses hail to make it utterly cold inside. (someone needs some blankets?)
So an Arceus walks into (maybe even arceus even flies into) the bar..

 

[Adam Levine]

...and sends Huntail out. Bad oarfish.

So a Druddigon walks into the bar...

 

[FireSnow]

...and gets mistaken for a hideous creature and chased out of the bar.

Soon after, an adorable little Pachirisu scurries into the bar...

 

[Sirfetch’d]

....and is exiled from the bar!

So then a Shiftry walks into a bar...

 

[Adam Levine]

...and gets very grumpy.

So a Joltik crawls into a bar...

 

[TheLegendaryGuy]

And gives the bartender the 'shock of his life'.
So then a Pidgeot flies into the same bar...

 

[Adam Levine]

...and asks Joltik to join his team. Joltik is afraid.

So a Cubchoo walks into the bar...

 

[PageEmp]

And bumps into a Chatot who flies out of the bar.

The Chatot's twin flies back into the bar...

 

[Adam Levine]

...and admires Pidgeot.

So a Lombre walks into the bar.

 

[Sirfetch’d]

....and evolves into Ludicolo before dancing!

So then a Budew walks into a bar...

 

[Adam Levine]

...and looks for its mother.

So a Kingler walks into a bar...

 

[PageEmp]

And tries holding a drink, which smashes thanks to his claws.

Rhyhorn runs into the bar...

 

[Adam Levine]

...and accidentally faints Kingler.

So a Dodrio runs into the bar...

 

[Lycanthropy]

...and orders three beers, one for each head.

Then a Whirlipede rolls into the bar...

 

[Sirfetch’d]

...and sets up a layer of Spikes at the door!

So then a Bellsprout walks into a bar...

 

[PageEmp]

And steps on the spikes. wups.

Maractus somehow shows up in the bar...

 

[Sirfetch’d]

....and pokes the bartender by mistake!

So then a Floatzel swims into a bar...

 

[Adam Levine]

...and gets a medal! The judge is in the bar.

So a Tyrantrum stomps its way into a bar...

 

[JJ Styles]

and orders a bucket of Lemonade for himself only.

So a Popplio flopped itself into a bar after escaping from the haters....

 

[Sirfetch’d]

...and tells a bad pun and everyone leaves.

So then a Castform floats into a bar...