The new's and traveling

Ash and Goh, just normal teenagers living normal lives. They both love Pokémon. Though they both have different goals, which makes them connect more. Ash wishes to become the worlds greatest Pokémon trainer, while Goh wishes to catch all the types of Pokémon leading up to Mew. What happens one day, after going for a trip to a new city, Ash goes missing? All that was left was a note, and his Pokémon. Can Goh solve the mystery to his best friends disappearance, with the help from some enemies?