Smogmella in Yo-kai Watch 2

Smogmella can be befriended by evolving Smogling at level 27.

She can also be freed from the past Crank-a-kai with a Yellow Coin and the Destiny Oni Crank-a-kai.

In Yo-kai Watch 2 in the past, while the player looks for a missing part to the Yo-kai Watch Model Zero, Smogmella gets inspirited by Schemer and turns into Badsmella. She causes trouble by inspiriting construction workers with her smoke. At Springdale Ironworks, she reveals herself and makes the player find her. On the final time, she battles the player. When defeated, Schemer stops inspiriting her and is defeated by either Arachnus or Toadal Dude (depending on the version). Arachnus/Toadal Dude tells Smogmella to come with them, and she apologizes to the player and goes away.