By Pokémon and Junichi Masuda.
Duration: 3:17.

Listen on YouTube.

Tracks that reference Battle! (Trainer Battle) (Pokémon Red / Pokémon Blue):

From Fandom:

• Intentional Pokemon by koba
• A Wild Fiduspawn Appeared! by Funk McLovin

From Beyond:

• Battle! Trainer (From "Pokémon Red / Green / Blue") by FalKKonE