In the Alola region, everyone knows of the 4 main islands. But Professor Kukui decided to take the class to the secret 5th island, the Destiny Island. They learned that a powerful pokemon is on the island and they try and find it.

Kukui: "Attendance... Ash, Lillie, Lana, Mallow, Sophocles, and Kiawe. Alright, everyone is here. Let's find that pokemon. Be careful"

Meanwhile, Sora was sitting on the paopu tree with his eevee in his lap (Its the lets go eevee). Kairi was with her Comfey making friendship lei necklaces. Riku was training with his Lucario and Tetra and his Garchomp on the beach, Lucario and Garchomp can mega evolve. Roxas was watching the sunset with Xion while eating ice cream together, Roxas's pikachu (Lets Go Pikachu) was asleep cuddling Xion's Mimikyu, they both have they're pokemons Z-Move. Axel was watching Roxas and Xion with Saix, Axel's Armarouge and Saix's Ceruledge were watching Axel and Saix, judging them both. Aqua was asleep on the beach with her Primarina, she had had primarina's Z-Move. Ventus was also asleep with his Altaria. And Naminé was talking and drawing with Steraxlia, Naminé's Magearna was playing with Steraxlia's Hattrem. Sora noticed the class first and Ash noticed the teens first

Sora & Ash: "Huh? Who are they?"

(You can be from the Kingdom Hearts Universe or the Pokemon Universe. Or just be some random person who washed up on shore or fell from the sky. Its your story so you decided)