Run and head to the Trainer's school

You can see the school in sight, but Lillie waves at you as if to show you something. Curious, you head to see what she wants.

"I just wanted to show you the Pokemon Center first," she says, with her finger pointing at a red building in the shape of a Pokeball. You follow her into the Center.

"The woman in the counter can restore your Pokemon to perfect health in a flash, which is good, 'cause I hate seeing Pokemon in pain. " says Lillie, "You can switch out Pokemon in the PC next to her. And the blue shop over there is the Poke Mart, where they have all kinds of items that should help you during your trials. And that brown shop is the cafe area, it's a good place to relax and have some Moomoo Milk. I heard once that every cafe in every Pokemon Center serves different drinks, and they may even have more than just drinks, like special treats and tips for trial-goers."

"Anyways, sorry for doing this, I just thought it would help," says Lillie, "We should head to the Trainer's school." You nod and head towards the school. The Rotom notes to you that it just set the Trainer's School as the next destination. Before you go, though, you head to the Poke Mart and buy some Potions and male condoms, one to heal your Pokemon, and one for the ladies.

"Here is the Trainer's school, " says Lillie, "It's a...a... what the?" She says that as soon as her eyes drift to a lone Tauros blocking the path ahead. "Well, looks like we're not going that way anytime soon, but whatever."

At the Trainer's school, you see Kukui, Lillie, and another person talking amongst each other. You join them.

"Hey, welcome to the Trainer's School, the place to learn how to be a Pokemon Trainer!" welcomes Kukui. "Professor Kukui," asks the lady, "is this the child you were talking about?"

"Yes, ma'am," replies Kukui, "Teach him what he needs to know, Teach. Remember, [insert player name here], you have to beat 4 trainers. It should give you some more experience for your Pokemon."

"The Trainers who you must battle may be in the school or outside," says the female teacher, "If you have time, feel free to visit the classrooms. I would teach you everything you need to know, but I think it's better for you to experience battling." She then leaves to the school.

"She may not look like much," says Kukui, "but she trains them kids right! One of them is a captain."