>DK universe and Mario universe are one in the same
>Diddy Kong Racing features Banjo and Conker
>Therefore, Banjo-Kazooie and Conker's Bad Fur Day are part of the Mario universe
>Also, Tricky appears in DKR and later in Dinosaur Planet, which became Star Fox Adventures
>Star Fox is in the same universe as Mario too
Wait, it's all Mario?

>>715828768 (OP)
Always has-a been.

>>715828768 (OP)
Nintendo also suggested that the player name their hero Mario or Luigi in the LoZ manual.

Link, Mario, and Yoshi also make cameos in DKC2.