Gates (Destinations of)
Until the party reaches the End of Time, Gates simply lead from one era to another. Afterwards, they mostly lead to the End of Time, though in one instance the Gates function as they did previously, taking Crono from 65000000 B.C. after the Tyrano Lair ruin to 12000 B.C. uninterrupted. Who controls how the Gates function?
All time Gates naturally connect two points in time and space, but at times each travel destination may connect to the End of Time. Other than Spekkio, Gaspar is the only person who resides there. Since Gaspar is the Guru of Time, he is responsible for Gates connecting to the End of Time, Conservation of Time theorem nonwithstanding. He decides if and when Gates will connect to the pillars at the End of Time. He may also have to witness a Gate used in order to acknowledge it and link it at the End of Time. The only requirement is that Crono and his crew have to find and use a Gate for it to link to the End of Time. As Gaspar put it:
Once you've been through a Gate, you can always use it to come here.