Hide and seek with the third Yungoos and Team Skull returns

Pretty easy challenge so far, you think, right? Just one more and then fight the boss and your first trial is done.

As you head onto the wooden bridge you realize there are 3 dens, with one of them containing the Yungoos. You see it at the bottom one, so you decide to check that den first. Interesting, there's nothing there, but you see the Yungoos running to the den above it. You run to it, hoping it's there, but again, nothing. You then see the Yungoos heading towards the last den on your far left, so you head there, thinking that this time, you can catch it, but it's not there when you look at it. You then spot the Yungoos heading to the first of the three dens again.

Tired as you are, it feels like this Yungoos is playing around with you, trying to make you give up the trial. As you cross the wooden bridge to that same den, you see the two Team Skull grunts again blocking your path.

"Yo yo yo," says one of them, "Remember us? The Berry thief boys? You messed up our stuff at the Berry fields, now it's time to mess up your trial! Your Pokemon are ours!"

(You are challenged by Team Skull Grunt!)

He sends out Drowzee! (Psychic type, level 11)
Strengths: Poison, Fighting
Weaknesses: Bug, Ghost, Dark