Sonic the Hedgehog and Tails used teleporters to pursue Dr. Ivo "Eggman" Robotnik, who planned to steal the Master Emerald to fuel his Death Egg. Later, Knuckles the Echidna also used them to stop an Eggrobo in it's attempt to steal the emerald. (VG: S&K)
Shattered World Crisis
After stopping Walter Naugus from stealing the recently-reassembled Master Emerald, Knuckles and Amy Rose were surprised to find a teleporter in Westside Island's Hidden Palace Zone, and use it to transport them and the Master Emerald to the Sky Sanctuary Zone on Angel Island. From there, they reached another teleporter and used it to return the emerald to its altar before the Shattered World Crisis was resolved and Angel Island would fall from the sky. (SU: #90)
- The Teleporters are based off Warp Points, that were first seen in Sonic & Knuckles.
- Teleporter on Sonic News Network