How do you supercharge a magnet?
You can supercharge a magnet by coiling a metal wire around a magnet then hooking both ends of the wire to a battery. Make sure the wire can conduct electricity and the more coils around the magnet, the better.
Can you supercharge a magnet to almost super powered nuclear levels and what would happen especially if you had the opposite polarities facing each other?
No, you cannot "supercharge" a magnet to "almost super powered nuclear levels", whatever that means. Electromagnetism is about 100 times weaker than the strong nuclear force, and about a hundred billion times stronger than the weak nuclear force. You can't, as far as we know, change the coupling constants of any of the fundamental forces. You can, of course, make an extremely powerful magnet. What "happens" if you have two such magnets with the opposite…