I used to watch this show, and I am personally very happy that the people at the Nicktoons Studio decided to stick it on Nick Toons Network. I think that it has all the makings of the classic Scooby-Doo episodes, except the monsters aren't guys, in rubber masks messing with people.
This show invokes creativity and tickles almost any cartoon lover's fancy. Unless of course it isn't your thing.
So watch Martin Mystery and give it a chance. Unless of course, narrow-minded-ness is your thing...
Then I'm gonna be wondering why you're even WATCHING cartoons.