[TOMT] A song from an early 2010s Pokemon game

I’ve got this song from a video game stuck in my head, it’s been bothering me for about a week now. I could have sworn it was from Pokemon white, but after skimming literally the entire soundtrack from that game, i’m lost. Here’s what I have:

• Against my better judgment, here’s an audio file of me humming it. (I apologize for the name of the website, it’s the only imgur-like site i could find for audio that didn’t want a sign-up). This is the only part of the song I remember, with the first part i recorded being that main thing stuck in my head.
• I’m 90% sure it’s from a mainline Pokemon game on the DS because of how i remember the sound font, so while its maybe possible, i doubt it from mystery dungeon EOS or anything past sun and moon.
• I know it sounds at least somewhat nostalgic to me, so gen 4,5, or mayybbeeeee ORAS.
• I was almost 100% sure that it was a town/city theme, but it could also just be one of the really good route themes, like route 10.
• The soundfont sounds kinda like the bridge (0:28-0:45) for sekka/icirrus city from pokemon white.
• I associate the song with Autumn for some reason? I originally assumed that was the case because of the route themes changing between seasons in that game, but who knows now.
• Whilst I’m not musically trained enough to tell you the key of the song, I can at least say that it’s in-between sounding melancholic and serene, maybe slightly adventurous. Not nearly as melancholic as Opelucid city from white, though.
• What’s most annoying to me is that i swear this is a fan-favourite song, not some super niche pick.

Anyone that can help, I sincerely appreciate. Thank you!