This is an illustration for a potential story with the cast of Gundam Wing in the world of Avatar (I'd be using the world of AtlA, but not the characters, so no Wufei meets Zuko.)

Shikamaru squints at him out of one eye. “Omoi,” he says, exasperated. “I'm going to be the first Avatar to ever throw the world out of balance,” Omoi says. “I'm going to cause—” “—me to go prematurely bald,” Shikamaru interrupts, and reaches up to grab his wrist, dragging him down onto the blanket next to him.

When Boba shows signs of a very old ability from his mother's side of the family, Jango puts out a call to his mother's homeworld to find him a teacher, and to recruit two new trainers to join the Cuy'val Dar. Hakoda assumes it will be an easy way to earn a few extra credits and help his tribe. He's very, very wrong.

Not the Pokémon AU you asked for but the one you’re getting anyway. Featuring: full time gym leader and local cryptid Zuko, badge challenger Sokka, and Katara who can only look at so many memes before she flips.