Junichi Masuda is a prominent figure in the world of Pokémon, serving as a composer, director, and producer for many Pokémon games, including Pokémon Omega Ruby and Alpha Sapphire. However, the specific track "Battle! Zinnia" is composed by Shota Kageyama, not Junichi Masuda. Shota Kageyama has contributed to various Pokémon games as a composer and is known for creating captivating and memorable music for the Pokémon series. "Battle! Zinnia" is particularly well-received for its intense and emotional composition, adding to the overall gaming experience in Pokémon Omega Ruby and Alpha Sapphire.