I am not a physicist. I understand that when matter meets anti-matter they annihilate each other which releases a massive amount of energy from the violent destructive reaction. I know that if you had about a kilogram of anti-matter it might be capable reacting as violently as a Tsar Bomba nuclear weapon. We have created tiny microscopic amounts of Anti-Hydrogen, I just figured why not create an Anti-Plutonium thinking maybe the energy release from a violent explosion starting with it touching Plutonium in large amounts would create a massively overpowered nuke...

Aaah yes i see, my brain is getting bigger already; i can feel the wrinkles forming- this is science.

Honestly I have no idea what I was talking about, I was stuck on youtube whilst drinking and came up with a dumb idea based on dumb ideas, which probably aren't even possible.