The Pokemon will fall asleep at the end of the next turn after becoming drowsy.

The Pokemon can’t use moves other than Snore or Sleep Talk. After a Pokemon is put to sleep, it will remain asleep on its first turn, it will have a 1-in-3 chance of being cured on its second turn, and it will be cured on its third turn. A Pokemon that used the move Rest has no chance of being cured until its third turn.