The worst trading card game in history. Period.
The basic idea is you subscribe to these cards in the mail, open them up excitedly, force your sister to play the game, get all angry cause the game sucks, punch a wall, go to the hospital, find an awesome way of playing the game, then get to school and find that no one has ever heard of them.
Weird and Wild Creatures Fanatic: The attack of the Emperor Penguin is so much better than the defense of the Cockroach.
Asylum Warden: Sure dude, whatever.