Played all three of them as a kid, here are my personal opinions:
1 is the one I played the least, mainly because of how different it felt to the snes counterpart which I didn't expect & like back then. Also since it's the first time they tried porting DKC to GB it often seemed borderline-broken to me. Wouldn't recommend.
2 was a much better port and I played the shit out of it, mainly because dkc2 on snes is still one of my favorite games to this day. Still does a few things different than the snes version but works much better all-around.
3 is another good port/spin-off, but also repeats many things that made dkc3 inferior to dkc2, so I'd recommend it depending on if you liked/disliked that, too.
I also just recently watched a youtube video by some guy reviewing all 3 parts of it and agreed with a lot of what was said, so check it out if you are interested in another opinion:https://www.youtube.com/watch?v=X8t1ryXPBdI>>57425