Super Mario Land 2: 6 Golden Coins/YMMV


 * Accidental Innuendo: Level 2 of Mario Zone is set approximately in the crotch area of a giant mechanical Mario. It's full of... balls. Big, bright balls, spiked balls, bears riding balls. Balls.
 * In the first level of Space Zone, there is mound of rocks that resembles a certain rude hand gesture...
 * Memetic Mutation: "Obey Wario, DESTROY MARIO!!!"
 * That One Boss: In the second game, the three pigs in the Mario Zone could be this, seeing as how they each take three hits to defeat, and there's three of them.
 * Ditto for the boss of Space Zone (who may or may not be Tatanga from the previous game), who is arguably right behind Wario as the toughest boss.
 * That One Level: Star Maze. Those stars are going to kill you many, many times.