New Super Mario Bros. Wii 2-player co-op is the best experience in the game

[Pyro as Bill]

Not played 4 player yet but I found 3 player more fun than 2.

Nintendo should have added a 'Modern Warfare' mode just for lols. Like free roam mode but the game would pause and give players objectives with 10 second time limits like "THROW LUIGI DOWN A HOLE" "BURN YELLOW TOAD" "STOMP MARIO". Points for achieving and surviving objectives.