These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Donkey Kong Country 3: Dixie Kong's Double Trouble!
Replacement Scrappy: Kiddy Kong is one for Donkey Kong, given that he plays almost exactly the same as Donkey Kong and the justification for his inclusion is that Donkey Kong was easily captured, AGAIN, no longer being playable in the game where his name in the title, AGAIN.
That One Level: Just like the first two Donkey Kong Country games, this game isn't without them.
Lightning Look-Out!! is a Luck-Based Mission: The level's difficulty is dictated by the random lightning strikes. Don't even try hiding in the water - you will get electrocuted in the water.
Stampede Sprint in Krematoa required you to escort a running Ellie and a banana bird to the end of the level, while being chased by Neeks. The Escort Mission itself has no room for error, where if he gets hit, he's lost for the level, unless you restart the level. Oh, there's a bunch of goddamned Buzzes around the level. Have fun!
Rocket Run, also in Krematoa is a hectic level, where if you run out of fuel, the rocket explodes, costing you a life. The second half of the level is essentially memorizing when to avoid the rock formations with absolutely fast reflexes. Did you get stuck by one? You're likely going to lose a life. At least, unless you're playing the GBA version, where the second half actually gives you fuel barrels...but as if to make up for it, the first half no longer gives the bottom of the rocket invincibility against the Buzzes, making parts of it require insanely precise timing and movement.
The racing minigame with the Turbo Ski in the GBA version (well, more That One Minigame than That One Level). All of the minigames added to the GBA version are annoying, but this one is especially bad. You have to do 3 laps around a fairly long track with the Turbo Ski, and hitting either the Kremling boats who are racing you or any of the walls decreases your health meter (and you often can't even tell when it's registering you hitting a wall, because it doesn't play a sound effect for it). If that runs out, you sink and fail the minigame. And you will fail. Many, many times.