What appears to be a charming little visual Easter egg in Donkey Kong Country: Tropical Freeze is actually so much more. Yes, DK whips out a 3DS and plays it when you leave him idle (he's done this in the past.) But he's actually playing Animal Crossing: New Leaf, Mario Kart 7 and even, well, Donkey Kong Country Returns.
Yes, that means Donkey Kong (like Cam Newton) enjoys playing with himself. GameXplain does a superb forensic examination of the sound effects to tell you exactly what DK is doing in each game and noting that even he races as himself in Mario Kart. When Diddy, Dixie or Cranky Kong ride piggy-back, they get into the action too.