Battletoads/YMMV

Battletoads -- the Video Game series

 * Awesome Music: The pause music. In fact, any song in Battletoads is made of win.
 * Breather Level: Not that the final level, Revolution, is easy at all, but compared to its predecessor, Clinger Winger...
 * Demonic Spiders: In the NES version of the first game, pretty much any enemy that can kill you in one hit.
 * The sharks in Terra Tubes. They chase you constantly, can knock you into spikes or kill you in three bites, and can only be stunned, not killed.
 * Evil Is Sexy: The Dark Queen.
 * Fan Yay: Mostly Big Blag, who appears in gay fanart every now and then.
 * Growing the Beard: The arcade game amped up the violence while doing away with the nerve-wracking obstacle course levels. It's definitely worth a few of your quarters should you ever stumble across a cabinet.
 * Memetic Mutation: "Is this Battletoads?"
 * "No, it's Doom 3."
 * When someone on 4Chan asks for the name of an anime, the common response is a combination of Boku No Pico, Bible Black, and Battletoads, leading to such titles as Boku no Bibletoads.
 * Would Game Stop happen to have a copy of Battletoads?
 * Fighting Frogs, Combat Amphibians
 * Porting Disaster: The Amiga version and its CD 32 offshot, though the remixed music of the latter is pretty kickin'.
 * That One Level: The most infamous level is the Turbo Tunnel, the third stage of the game, which is when the difficulty goes through the roof. Of course, once you finally manage to get through it, some of the later stages turn out to be be even harder. Another major (but less-known due to it being so far in the game) level is Clinger-Winger, level 11. It qualifies for two reasons: First, due to a bug, it is impossible to win when playing two players in the NTSC NES release (it was fixed in the PAL NES release as well as in the Genesis remake), meaning it is impossible to win the game unless you're playing solo (or wait for the other player to lose all their lives so you can continue on by yourself). The other reason is that it's essentially the aforementioned Turbo Tunnel (there is very little room for error), only made even harder, with absolutely no check points to boot. Oh, and you have to fight a boss at the end. Fortunately, they don't make you go all the way back to the beginning if you die to the boss.
 * If it helps any -- by pausing the game the moment you come to any turn, you can then make a near-perfect turn every time, making this level a breeze. All bets are off with a second player.
 * Level 10, Rat Race. The first two aren't that bad by Battletoads standards, but the third race is a nightmare.
 * The Snake Level. Giant snakes come out of the tunnels in the level, and you need them to climb to the top of each portion of the stage to advance. It becomes stupidly hard, even with a Guide Dang It, because in the later segments you must drop from one snake to the next, and it must be timed perfectly or you will miss the next snake and land on Spikes of Doom.
 * Level 9, Terra Tubes. It's one of the longest stages in the game, and it's full of nasty instakill traps (spikes, wheels, robots that explode if you try to get past them, and duckies).

Battletoads -- The animated series that never made it past pilot.

 * Les Yay: Some viewers found a strong homoerotic subtext the scene where the Dark Queen grabs Princess Angelica, who tries to tries to push her away even though the Dark Queen is grabbing her closer.
 * They Just Didn't Care