Obscure pick time.
So there was this gamecube game called Evolution Worlds which was a port of two games from the Sega Dreamcast and it was probably the first RPG I played (not counting Pokemon Yellow). The second game was pretty intact, but the first game was pretty heavily gutted (as I would find out years later) with the dungeons being replaced with generic dungeons and the dungeon themes being replaced with the second game's first dungeon track
So the first 2 or 3 dungeons had this song playing:
And it's probably the song I'll remember most from that game (though the song is pretty good anyway).
The Phantom of the Bwahpera. Altough I don't have Mario & RAbbids, I really like this song, as my favourite music genre is classical music, including operas and symphonys - and this song is like an operatic aria about Mario.
Also, when I play Mario Kart with friends or in a tournament (yes, there are regular offline Mario Kart tournaments in Austria) and get a spiny shell, I must always think about the lines "you are first and doing so well, / but here comes the spiny shell! Ha ha ha!"
Also, Odyssey's opening song, Jump up, Super Star, remains stuck in my head, but I guess I'm not the only one here...
After I memorized it, it keeps playing in my head. I love it. Before I had no idea of how it sounded like despite the fact I love Bonechill. It must be the sound effect of the falling icicles that distract me, because when I heard this I really thought it was the first time I ever heard it, despite having played many times through the game.