A collection of soundtracks from Kankyou Vol.2 (艦響Vol.2), the official soundtrack album for the anime movie adaptation of the browser game Kantai Collection.
I was almost positive that this was a song from the Pokemon TV series but I had no idea what season or episode. I tried listening to most of the movie soundtracks on YouTube and couldn’t find it. This song was the most comparable:
I knew for a fact that it was previously featured in a video called “The Joy of Pokemon +493” on YouTube but that video was taken down due to a copyright claim.