Answer:
I think you are correct in the sense that he is the most know, he's a worldwide phenomenon, everyone knows who Mario is, but I think that title can fluctuate and has gone to others for a while, he is the most known though, that's for sure.
Explanation:
The following is required for the job of a spy: you will need to be sneaky lightfooted
and good info stealing skills. you need to be able to work your way into who your spying ons company, also get past lasers have good disguises, and be able to fight