Rhythm Heaven/Fridge

Fridge Brilliance

 * One of the reasons Donk Donk may be so odd compared to the other games is its rhythm--electrodes and octopi may not be inherently weirder than, say, Working Dough, but Donk Donk's rhythms are in triple time (DONK-DONK-wait DONK-DONK-wait), while almost every other game has double time rhythms (WHOA, you-GO big GUY *tap TAP*).
 * Think how you'd say "Cheerleaders" if you were doing it in a stereotypical Engrish voice. Then remember that (at least in Japan) one of the games is full of Intentional Engrish for Funny...