Basically, just come and pitch the sillies ideas you can come up with as a Kryptonite-Level weakness for a Viltrumite. Go nuts!
Myself: Shave off the Moustache. It works just like Samson… without the hair they are significantly weakened! Now, you might ask ‘what about the women’? They have invisible moustaches.
That’s why Mark gets pummeled so often, he hasn’t grown one yet.
Tetris. They are hopelessly addicted to the classic Tetris video game.