Super Mario GP
A nice little sign that says exactly that
Super Mario
The S and O in those two words are bigger than the letters in 'uper mari'
Sunshine Parts
There isn't much to say besides the fact that 'Sunshine' is in reference to the game Super Mario Sunshine
Other
Setting
This isn't confirmed, but it makes sense. Although this level doesn't seem to be based on any level from a previous Mario game, we believe that it's Dorrie's homeplace. Dorrie is the dinosaur found in the game Super Mario 64, the one in the Hazy Maze Cave level that helps Mario reach higher platforms above the water.
// A mysterious character within the Banjo-Kazooie series was meant to star in his own N64 spin-off...
