I am on my cell here, so this will be quick.
Start by using heal bell to get rid of the poison. After that use magnet rise to rise above the ground and avoid any other funny moves. Then end it with flamethrower to burn it to crisp. If it uses protecton the last action, aim at the surrouding ice so that stinky joltik takes a bath.
Heal bell - magnet rise - flamethrower
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