I think some spinoffs are ruining the series. Mario, Luigi, and Peach appearing in those SSX and NBA games along side people that have never been to the Mushroom Kingdom, that's completely messing up the original story.
Mario and Luigi followed a scream for help they heard (according to Mario Bros) , and followed the pipes all the way to the Mushroom Kingdom (events of SMB play out). After rescuing the Princess, they agree to stay with her and help her and the Kingdom out until they can find a way to get back home to Brooklyn (events of SMB2, 3, World).
I think that after saving her in SMW, they realise there is little/no hope of them getting back home, so they ask the Princess to help find a place for them to live (thus where their house came from in SMRPG), and after getting all moved in, they decide to show the people of the Kingdom what the Bros do for fun in the real world, and thus the spinoffs start happening.
What I want to know is if a search party has been sent out to find the Bros? They disappeared on the job, didn't they? Wouldn't their former employer wonder what happened to them?.. and Pauline, Mario's first girlfriend. If she was originally in Brooklyn, how is it she can come back for games like Mario vs DK?
Speaking of DK, how is it he keeps appearing in Mario games? He was supposed to be locked up in a cage in the Brooklyn zoo, wasn't he??
I realise that most of this probably belongs in the Mariology thread, but I've often thought about things like this.