A complete gimmick deck, based around luck and destroying your opponent's deck faster than they can kill you. Will be heavily reliant on the right cards to set up Pokémon, but needs the deck to be mostly devoid of Trainer or Pokémon cards to be most effective, so will have to rely mostly on luck.
When underway, Avalugg has the potential to destroy the top 9 cards of the opponent's deck per turn. The only weakness is not dying in the meantime, and discarding energy cards, not cards you would want.
It will come down to luck, but as this is a weird boss-fight deck to play against friends for fun, it should be alright :)