Donkey Kong Land 3 seems to be the least buggy DK game made by Rareware, but I accidentally found a bug with Lurchin just now.
In Ugly Ducting, it is possible to defeat a Lurchin by jumping on top of it. Yeah, you read that right. You're probably wondering, "How can you jump on a Lurchin when it's underwater?" Well, right near the Star Barrel, there are a couple that touch the very top of the water. If you jump on the water and touch it at this point, you can defeat it! It's really difficult to do, though, but here's an animated GIF for your pleasure!
By the way, this also works in the Game Boy version as well. (Not surprising, as they are identical gameplay-wise.)
Also, a variation of the glitch works with a steel barrel (I knew this when I first got the game, though). Since barrels don't float on water like they do in DKC3, it'll sink down, and if it hits an enemy, it'll defeat it. You can do this near Koin in the same level. Here's an animated GIF with a steel barrel defeating a Koco (If this is running too slow on your computer, let me know and I'll lower the framerate):