Things in certain Mario games that annoy me to no end.

64-Bit Nintendo Machine

64 Bits of Power!
In Super Princess Peach, I remember that there are rooms that contain poison gas that can only be blown away with Joy. It still comes back to get you so you can't make it go away permanently. This is from when I was like six or seven and it still haunts me to this day.

8-Airship from Mario 3. Enough said.

Darker side part with Glydon, you have to use him to glide across the void but I found that he falls too fast and more often than not, I die.

Getting all star coins in NSMBU. I've done it but it's not easy.
 
Some parts of Super Paper Mario and TTYD (as much as I do love both those games) annoy me

Also I can't save in TTYD's pit of 100 trials. I'd love to do it, but I just don't have enough time to complete it without saving
 
Dying to something repeatedly that I never normally die to.
 
I personally found SMW2: Yoshi's Island's collectathon mechanics to be obnoxious and unfun. In my personal opinion, making the red coins barely distinct from regular coins and being revealed anyway by a magnifying glass to be pointless and all it does is to force you to meticulously search large areas of coins for it, and a lot of the red coins are found in areas where it rewards you for exploring and experimentation anyway.

The coin item in Mario Kart 8 Deluxe is the most unfun item in any Mario Kart game and it pollutes mono-item races (you can get doubles of it in mono item races as well). I hate it.
 
Also I can't save in TTYD's pit of 100 trials. I'd love to do it, but I just don't have enough time to complete it without saving
In such a case for me, if playing on console I would just flip off the TV and leave the game on the pause menu between battles, if playing on emulator I'd save-state (or use the cheat that lets you bring up the save prompt wherever, which actually i believe you can get that to work on console too with the Practice Codes, since they are activated by a hacked save file)

Speaking of Super Princess Peach in the OP, there's also those rooms that ambush you with a fucking wall of fast blindfolded Boos which not only creeped me out but was pretty sudden, you have to cry to run fast enough to outrun them. It wasn't till years later I realized the genius of the blindfolds though- they can't see you so they are immune to you looking at them.
 
if playing on console I would just flip off the TV and leave the game on the pause menu between battles
thatd expend a lot of pwoer
if playing on emulator I'd save-state
only got the bom version and i want to do it using the original game, preferably on the gc
i believe you can get that to work on console too with the Practice Codes, since they are activated by a hacked save file)
gamecube isnt hacked, plus id prefer it to be more legit than that
 
Is that Luigi's Mansion 3