I've never tried Showdown, but I used to play on Online when Gen 5 came out. Most people didn't know much about the new Pokemon, so Volcarona and Haxorus were trolltastic. Obviously legitimately skilled players had less trouble, but it was fun to watch people let me get off 3+ Quiver Dances.
"Whoa! Heads up, detecting high levels of space chickens." "No! Space chickens are a surgeon's worst nightmare."