Davesprite

Alternate Future Dave is the Dave that resulted from a universe where John was tricked by the Trolls into being killed by the Denizens. This resulted also in Jade's death leaving just Dave and Rose.

We first see Alternate Future Dave on the Land of Heat and Clockwork four months into the future, where he discusses the deaths of his friends with Rose. Dave is at a high level managing to defeat hard enemies with ease, as well as having obtained some cool stuff from the Alchemiter.

After learning as much as possible about the worlds Future Dave uses his Timetables to travel back to a period right before he prototyped his Kernelsprite for the second time. He stopped John from skipping ahead to the 7th gate and getting killed by his Denizen and Dave from using Lil Cal, instead handing over his inventory cards before jumping into the Kernelsprite. By doing this, he prototypes himself and saves present Dave from having to go through the game with the entirely unhelpful Calsprite, becoming Davesprite in the process. As a Kernelsprite he gains access to the game's information, in addition to everything he learnt in the future. Although he is supposed to be cagey about the information, he promises to share it all with his present day self, simply because he "doesn't really feel like it". He also retains use of his iShades, as they were the only thing he took with him when he jumped into the sprite.