Fusion Athletics truly offers something for EVERYBODY. Green Bay, Wisconsin's #1 Gym! Located in Green Bay, WI 54303, Fusion Athletics provides amazing classes in All Star Cheer, All Star Prep, Tumbling Class, Ninja Classes, Camps & Clinics, Birthday Parties, Open Gym, and more. Our kind, courteous and friendly staff of professional educators is excited to meet you and help your athlete achieve their goals.