The music of Beastieball is provided by Lena Raine, famous for her work on the soundtrack of Celeste as well as Minecraft. Sound design in general is being made by Em Halberstadt and Preston Wright. The game's soundtrack aims for a mix of relaxed and energetic vibes, attempting to combine the cozyness of a nature trip with the excitement of a sports match, as befits the game's themes.
- Rutile
, the theme of the settlement by the same name, features a fair amount of chiptune, giving a cozy feeling befitting the sleepy town where the player starts their adventure. - Summer Blossom, which prominently plays around Riley, features a lively, upbeat tune, perfect for the beginning of the game, where it plays as a more low-quality version on a radio.
- Vs. The Rutile All Stars, the theme of the first faced ranked coach Redd, features plently of fast-paced chiptune, fitting for a coach of a previous generation.
- Welcome to Beastieball prominently features voice sampling, most interestingly a short clip from a news report about Pokémonnote , using it as a double meaning, where it here seems reminiscent of the way one would describe a sports team.
