Rhino Neil

Rhino Neil was a green anthropomorphic rhino, who offered Sonic and the Freedom Fighters a vacation in his new Paradise Dome. All of the Freedom Fighters chose to accept the offer, except for Sonic.

In fact, Rhino Neil was Doctor Robotnik in disguise, and the Paradise Dome was a trap. Luckily, Sonic realised the deception (after "Rhino Neil" referred to him as "Spikeball") and returned in time to save his friends.