Hi! I've been playing around with SMBX2 recently, and just started using it a month or two ago. I made some custom GFX based off of DKC and I though I might as well share it sense there seems to be a lack of DKC tilesets.
I currently have made DKC Jungle (Day,Night,Sunset), DKC Cave (Orange,Green), DKC2 Ship (Normal,Sunset,Rattle Battle), DKC2 Ship Hold (Normal,Lava,Glimmer), DKC2 Mine, and DKC2 Castle.
If you want the enemies sprites I made, I can upload them too. IMO they look hideous so I haven't uploaded them.
Also, all the backgrounds are the org background textures, just edited a bit to fit the base background-2 sizes.
I made this GFX in SMBX2mx3. Not completally sure if that matters, as I have only been using SMBX for a month or two.