Gingerbread Man
Paratroopa
True, but Yoshi levels often had an Island- or Story-esque estethic as well, and he's definitely from the Mushroom Kingdom (poor Wario got no rappresentation though, excluding Mario Party 10 and that Arcade GP track).The simple distinction of setting when going from the usual Mario places where there's eyes on plants, mountains, clouds and so on, and going for a more down to earth representation of a jungle from DKC games in the many scenarios they choose as DK's home turf in Mario SpinOffs.
There's also the ending of DK'94, where Mario gets through a pipe and arrives on the Mushroom Kingdom, getting a Super Mushroom and finally becoming Super Mario. -- I always saw that DK Island was at very least set somewhere in the real world, as we later see the origins of the Arcade title on Big Ape City in DKL too. Admittedly New Donk City from Odyssey muds the waters of that theory a little bit, but I could see as some kind homage made in Mario's universe after the fact.
The only time where DK Island was seen explicitly as the same part of the Mario universe was in the Illumination Movie with their Jungle Kingdom take;.. but this I can shrug off as some kind of its own canon separated from the games.
As far I'm concerned, Mario and Donkey Kong characters only get to visit each other places for Go-Karting, Sports, board games and so forth through dimensional Warp Pipes![]()
I personally see DK Island somewhere on the same dimension and planet of the Mushroom Kingdom, just far from it, and in DK94, Mario chases DK literally all around the world to save Pauline.
Though I guess the difference between "another dimension" or "very, very far on the same planet" is not that huge in a cartoon-ish world.