So, in this situation, what exactly would happen?
Pokemon Trainer Jeff sent out Groudon!
Pokemon Trainer Joe sent out Silvally!
Groudon reverted to its Primal Forme!
"Groudon's Desolate Land"
The sunlight turned extremely harsh!
blablabla the trainers choose their moves
Sivally used Multi-Attack (Water)
Would the attack evaporate? If Multi-Attack, Hidden Power, or Judgment were Water type?
(Same goes for Primordial Sea and Fire Type)