No.
Yes, PlayStation Plus is required to play any PlayStation game online.
No, only xbox.
No, there isn't and there never will be. Nintendo doesn't make games for systems owned by other company. So Nintendo will never make a game for PS2, XBOX, 360, PS3, or any other system owned by a different company. So no Nintendo games for Sony.
yes but only to play a ps1 game
No, Mario is Only for Nintendo.
They might make one, but they still haven't revealed any information on the game.
No, PS3 games are region locked. There's a number on the side of the game and it has to match the number of your PS3. An earlier answer said the answer was yes any PS3 can Play any game
No, there isn't. The Legend of Zelda is a series strictly for any Nintendo product, and not PlayStation or XBox.
NO, Chowder is not planning to come out with a video game any time soon.
Yes you can.
Any "The Sims" game on the PlayStation 2 platform does not allow you to make any other floors, just the ground floor.