The Phantasy Star MMOs contain many references to other ##Sonic Team## titles, including weapons such as the "Sonic Knuckles", which are actually Knuckles' gloves, armor auras, Chu-Chu Rocket themed Go Go Balls, several mag evolutions, cameos from sonic characters, background music for lobbies, player rooms and certain quests, and sonic anniversary lobbies.


A more subtle reference can be found in the christmas lobby music in Phantasy Star Universe and Phantasy Star Online 2. They contain what sounds like an instrumental re-arrangement of the credits theme of Sega Saturn version of Sonic 3D Blast, "You're my hero" as the christmas online lobby background music. Phantasy Star Online however, instead had an instrumental arrangement of "Jingle Bells".