From SMS Power!

Credits: Champion Boxing (チャンピオンボクシング)

Uncredited in-game

Developer

Yu Suzuki

Planner

Yoji Ishii

Designer

Rieko Kodama

Guidance

Yoshiki Kawasaki

Credits Incomplete

Sources:

• http://www.smspower.org/uploads/Translations/PhantasyStar-SMS-EN-videofenky-interview-translation/
• https://www.youtube.com/watch?v=_ep621Bw4n4 - interview with Rieko Kodama

See the main page for Champion Boxing (チャンピオンボクシング)