The park added its sixth major roller coaster, Zonga, in 2003. Designed by Anton Schwarzkopf, the ride was relocated from Six Flags Astroworld and received major track modification by Premiere Rides before it opened at Marine World. Zonga opened in late April with a sporadic operation. The ride was often closed because of mechanical problems, and when it did operate, it often closed for short periods of time due to ride errors. Eventually the park delayed its opening to 12 noon every day, completely blocking the ride plaza to park guests. Zonga's last season of operation was 2004; it then sat dormant until it was removed in 2006 and placed in the parking lot for storage. By the beginning of the 2007 season, Zonga was removed from the parking lot. It is now operating at the San Marcos National Fair in Mexico. The park also began showing Stargate SG3000 in its Iwerks 3D Turbo Theater, which finally received new branding and was no longer called DinoSphere.
