Advantage

(Ain't that sweet, all the weaknesses you can use! Drowzee goes down in a snap)

"Dang it, my team got destroyed!" exclaims the grunt before handing you $320.

"Stop trying to act hard, kid," says the other grunt, "Maybe let's take out Illima instead, pal, he needed this guy in order to win."
"Good idea," agrees the grunt, "Verdant Cavern is not too far anyways." Then they run out of the Berry fields.

"Thanks for your help," says the owner, "Here is something for your help." (You obtained some Oran Berries!)
"It can heal your Pokemon for up to 10 HP. You can feed it to them or it can eat it by itself when needed. If you need more, you don't need to look Berry hard, hahaha."