Why isn't samus in a mario kart game?

[sc94597]

@ The ghost of rubang
It doesn't matter if the game sucks its still qualified as a mario kart game that nintendo made but also had another developer. ( namco)
Where did you get diddy kong as a spiritual successor from? Is that your own opinion?
R.O.B still didn't appear in the game.

Thank you for at least trying to contribute to the thread while others say fail.