Board Thread:General Discussion/@comment-26006155-20181123023529/@comment-26006155-20181123164719

TheHumanAmbassador wrote: "Ambassador, Undertale specifies that the creepy voice Frisk hears in the True Lab Elevator is one he's never heard before."

It's Asriel's voice. The soundbytes match perfectly with Asriel's patterns when they're in their Hyperdeath form. And yes, I know Asriel is still Flowey at that point, but we know he CAN still use Asriel's voice in this form:He does so at the end of the Genocide Route when he begs Chara not to kill him, this time, in Asriel's child form. The call says you'll meet him soon, and you DID meet Asriel. The pieces were in place. I never noticed that Hypergod of Death Asriel had the same voice as Elevator Man. That is interesting.

But remember that Flowey didn't become Asriel until Frisk leaves the elevator and the True Lab, meets Asgore and all his friends, and Flowey absorbs them all to achieve his true form of Asriel.

So there's definitely a time paradox of sorts at work here.

Also.. the voice says "It's been a long time, hasn't it?" Flowey talks to Frisk frequently during the game. This is somebody who clearly used to know Frisk.. but Frisk doesn't recognize him.

There are strange details and unanswered questions here. But if Gaster was able to use Asriel as a puppet of sorts, that might also explain the voice.