Generation Vii
Misty Surge
Turns the ground into Misty Terrain when the Pokémon enters a battle.
Detailed Effect
When this Pokémon enters battle, it changes the terrain to Misty Terrain.
Pokémon With Misty Surge
2 canonical Pokémon forms can have this Ability.
Tapu Fini 
Galarian Weezing 