Ultra Alola Book One: Rise of the Beasts

"Beat the challenge, save your brother. Or, go on with your life and let him suffer. The choice is yours."

Kylo is from Sinnoh.
He lived in the cold region with his mom and his younger brother, who is sick.
Kylo would do anything for his brother, absolutely anything. That included moving to Alola, which even though Kylo didn't like, he accepted. Now his brother is doing better, but is still sick.
Kylo and his mom can't seem to figure out why. However, when a chance encounter with Tapu Lele offers hope, Kylo begins the island challenge. He is given a Jangmo-o, a black Z-Ring, and a mission: Beat the island challenge, and win a cure for his brother. Now, with heart in his head, and a goal in mind, Kylo begins.
But along the way, Kylo finds hidden conspiracies, and is dragged into a war against the mysterious Ultra Beasts.
Kylo must now make a choice; save his brother, or save the world.

But no one wants to make that decision.....