Here are some demos missing from the database. All of them are US releases and come with links. As you can see I have added most of the info for these demos on VGRebirth.
Aggressive Inline Demo (PS2) - http://vgrebirth.org/games/game.asp?...ssive%2Binline
Dark Cloud 2 Demo (PS2) - http://vgrebirth.org/games/game.asp?...3Ddark%2Bcloud
Dual Hearts Demo CD (PS2) - http://vgrebirth.org/games/game.asp?...Ddual%2Bhearts
Fully Loaded: Fall 2003 Demo (PS2) - http://vgrebirth.org/games/game.asp?...fully%2Bloaded
Gran Turismo Demo Disc (PS1) - http://vgrebirth.org/games/game.asp?...gran%2Bturismo
Unknown Name Demo Disc (PS1) - http://vgrebirth.org/games/game.asp?...ords%3Dholiday
Metal Arms: Glitch in the System Demo (Xbox) - http://vgrebirth.org/games/game.asp?...3Dmetal%2Barms
namco trans|mission Vol. 2 (PS2) - http://vgrebirth.org/games/game.asp?...ywords%3Dnamco
Unison: Rebels of Rhythm & Dance / Dead or Alive 2: Hardcore Demo (PS2) - http://vgrebirth.org/games/game.asp?...words%3Dunison
War of the Monsters Demo (PS2) - http://vgrebirth.org/games/game.asp?...war%2Bmonsters
*Correction* The Hot Shots Golf 3 Demo comes with Parappa 2 not 3. Would you guys mind adding them to the database?