YMMV tropes from the video game:

  • Alternate Character Interpretation: Does Mario callously let Yoshi fall into the pit just so he [Mario] could get a higher jump? Or is Yoshi throwing Mario off him, providing a Heroic Sacrifice?
  • Game Breaker:
    • Yoshi himself can be a Game Breaker depending on the situation. In fact, both SMW hackers and Nintendo have acknowledged this by making Mario leave Yoshi whenever he finishes the level.
    • If you have the cape, you can fly over most levels. The same goes for the blue Yoshi, which can fly after eating any Koopa. Even worse, if you have a cape and a blue Yoshi (or any Yoshi and a blue shell), you can fly for a very long time without even having to mash the button.
    • The brokenness of the cape extends to slowing down Mario's midair descent even more than either of the flight-oriented suits in Mario 3, making landings a cinch, and its spin attack kills most enemies and blocks most projectile attacks, making Mario near-impervious for any reasonably skilled player.
  • Gannon Banned: This game is Super Mario Bros. 4, so don't ask Nintendo to make one. Got it? Game Mods with that name can cause similar reactions, too, unless the mod in question is an intended Mythology Gag to the Japanese name.
  • Good Bad Bugs:
    • The Wiggler glitch in Forest of Illusion 1 makes Scoring Points ridiculously easy in the SNES version. (On the other hand, the points Cap is significantly lower, as there's 1 less digit allocated to the score display.
    • The Ludicrous Speed glitch could be considered this.
  • Crowning Moment of Funny: Quite of few of the end-of-world cutscenes, but the highlight has to be Castle #5's.
  • Hell Is That Noise: Despite being supposed to be the Most Wonderful Sound, the Keyhole sound effect is this instead. Don't deny it. That's why the Game Boy Advance Updated Rerelease toned it down.
  • Snark Bait: In the SNES vs Megadrive Console Wars, it was this game that received the full force of Sega's bile for being the direct competitor to the Sonic the Hedgehog series, and was constantly lambasted in all Sonic media (sometimes via Lawyer-Friendly Cameo) for being 'slow', 'boring', 'old-fashioned', 'childish', etc. etc.
    • It extended to some of the other systems as well. One commercial for the Turbo-Graphix 16 starts with "The passive type plays Nintendo" with Super Mario World shown (hilariously, the next part says "The aggressive type plays Sega" with a clip from Sonic the Hedgehog playing).
  • That One Level: Tubular (level 2 of Star Road) is a notorious example. The entire stage is basically making it across a giant pit with the P-Balloon Power-Up, except you need to actually stop and hit certain blocks to find more balloons, or else you're not gonna make it in time. On top of that, thanks to this, you're basically a One-Hit-Point Wonder, and you have to make it through fairly difficult attack patterns to hit said blocks.
    • Awesome (level 4) is no slouch, either. A run across a slippery ice world with kicker Koopas sending shells at you every step of the way, followed by a platforming sequence over equally slippy narrow platforms with giant Bullet Bills, infinite flying fish, and finally a jump boost off a flying Koopa to another slippery platform to jump a decent distance to the exit pipe.

YMMV tropes from the Super Mario World TV series:

 

Yoshi: [jumps into Luigi's arms and licks his cheek] Mama Luigi!
Luigi: Cool it, caterpillar breath! I'm not your—
Mario: Mama? Mama Luigi?! AHAHAHAHAHA!