OG project by @SquigglyTuff, go check them out they do amazing stuff. You can replace characters by going into their costumes and replacing the poses with your characters' poses. Add or delete as many frames as you want, as long as the first frame of the animation has the same name.
SquigglyTuff for the original project Sprites are done by TNTrouble Song and p1 notes are by the Golden Apple team, look them up! This is not going to be a thing I do, just wanted to remake the biggest fnf project on scratch.