Regional forms! Post your own, post ones you like, post ideas, anything! I'll go first with Sinnoh Crobat (the one on right is the shiny)

Sinnohan Crobat
Poison/Ice
Snow Cloak/ Dazzling/ Techinician (Hidden)

The Crobat found in Sinnoh have adapted to the region’s cold climate. Their thick fur protects them from the harsh winds and snow, and keeps them warm enough to hunt outside and travel between the many caves they call home. Their thick pelt also collects snowflakes as they fly, and with each flap of their wings they leave behind them a beautiful trail of ice and snow. For many years the people of Sinnoh believed Crobat to be the cause of a rare phenomenon known as ‘diamond dust’.

Moves: Powder Snow, Ice Shard, Frost Breath, Avalanche