[@Overlord24]
"Actually he is from a different Universe altogether. I have been through a good number so if he is here that means one of the actually void sans's left open a rift and went Sans tried to take a shortcut he ended up shortcutting through the other side of rift and to here. Honestly, there are so many variables to how I can be and he is here too. Plus I don't think this San is really aware of the fact there being multiple timelines and a multiverse, unlike mine,"  Frisk sans while taking out a spider soda, a spider donut, and a crab apple before continuing to look through her inventory.