I asked Snurtle, Johan, Mattkan, nobody knows the answer.
Like it's a gani which involves the grab gani, so I searched for the grab gani in my Graal folder, copied, pasted in Graal folder itself (not Graal/levels/ganis), changed name to x.gani, added 4 images which aren't related, saved, opened, it's idle.gani, however when I then started anew and redid the whole grab.gani with the added sprites, opened and it's still idle.gani.
However when I deleted the 4 added images then open the own-made grab.gani it shows up as the own-made grab.gani, not idle.
I think the image is fault, because I just added SPRITES and some random integers and got some random image, then added it, saved, reopened and the images are still there, no idle.gani or anything.