first of all its wrong compiled, your mod.zip has to have only 3 things inside (sprite folder, info.xml and icon.png) and your zip has 1 folder "jolteon" and inside that the other 3... you need to compile those 3, no 1 folder and inside those 3
after that I did compiled it like I say and works, on pc Jolteon looks gigantic, and the amongus almost the same, maybe you gonna need to tweak the coordinates to zoom out or something, try do what I told see if works then
remember, zip only those 3 files
when u open your mod it has to have only those 3 things, if you open it, and it has just 1 folder, and inside the other 3, its wrong done