After all your traveling and Gym badge-collection, you're finally at the Pokemon League.
Here, you'll battle the four trainers known as the Elite Four, who each specialize
in a type of Pokemon (like Gym Leaders). After defeating them and defeating the Champion,
you'll become a Champion yourself.
Heal your Pokemon in the Pokemon Center outside and stock up on all the items you
would need (all of them).
Inside, you'll be greeted by Malva, one of the Elite Four. After a brief chat, it's time
to challenge the Elite Four! You start off in the middle. Behind each of the four
doors is an Elite Four member. You can choose to battle them in any order.
After defeating Champion Diantha, she'll take you to the Hall of Fame, where you
and your Pokemon will receive recognition as champions forever! A few days later,
you're in Lumiose City along with your friends, on a big stage and being cheered
on for your accomplishments.
Interestingly, the tall man, known as Pokemon Trainer AZ, will battle you.
He uses a Lv. 60 Torkoal,
Lv. 60 Sigilyph,
and Lv. 60 Golurk.
Afterwards, a cut scene will play, showing AZ's Floette returning to him after 3,000 years.
Credits will roll. Congratulations! You've completed the game!
Even though you've completed the game, there's still plenty of things to do.
Continue on with the post-game walkthrough...