Well take a little look at my timeline
First would be Yoshi's island DS (also don't forget the mario vs wario comic, the satan one and the megaman one are not cannon) He starts in diamond city with Warioware , somewhere along the line he gets into smash bros, then Game & Wario takes place, and his latest games there do badly enough to shut down his operation,but he still remains popular, bringing his greed into the woods with Wario's Woods, re-adopting the main suit and coming back into smash with his traditional costume, along with all Mario spin-off games that he has appeared in (plus wario blast), where he learns mario's personality and comes to despise him, starting Mario & Wario (not the comic). Next, wario does a a thing , hence wario master of disguise. Then, after MANY other mario games Super Maro land takes place and during that wario sneaks into mario's castle, with mario land 2 taking place. Following that up is Wario land , which leads to 2 possible routes, One were he gets his castle, leading to wario land 2, and the other were he gets any other result, (the planet has no homes on it) leads to Wario land Shake It! , were he's back in Diamond city, then Wario land 4, were he gets enough treasure to make a castle, seen in wario world. I am putting wario world here since it says that this is immediatly after the building of the castle. Then, both of the branches come back together here, where wario takes a break, and here's were i'll agree with the 3rd wario brother (partly), he goes on a trip to the amazon, were wario land 3 takes place, were he crashes his plane on the way their, and he fixes it and continues to the amazon, were VB wario land takes place, and in every ending in which he gets back home is canon, and then would be mario party, since in those games,it says "welcome to mario land" rest is undecided
Waluigi is a guy he found while playing tennis.