A Super Smash Bros tournament was turned on its head recently when one man did the unthinkable. In this clip you'll see a man unplug his traditional controller and opt for an N64 fishing rod controller for the second in the best of 3 match. I can't even imagine what was going through the other guys head when this bad boy got whipped out mid match. Probably something like "I better not los...crap".
Depending on your level of sportsmanship you could raise a fuss saying the player had an advantage...but looking at his controller layout I doubt that's likely. See him reel in the W in the video below.