North America * Animal Paradise * Bratz Ponyz 2 * Di-Gata Defenders * Dragon Quest IV: Chapters of the Chosen * Drawn to Life: SpongeBob SquarePants Edition * Igor * Line Rider 2 Unbound * My Secret World by Imagine * Red Bull BC One * Star Wars: The Force Unleashed * Unsolved Crimes
Europe * Allied Ace Pilots * Jackass: The Game * Jewel Quest: Expeditions * Mah Jong Quest: Expeditions * Mahjongg DS * My Secret World by Imagine * Star Wars: The Force Unleashed * Tim Stockdale's Riding Star
Japan * Dragon Ball DS * Illumi Slight: Hikari no Puzzle * Long Vacation: Iruka to Watashi * Ochishi Keiji: Keiji-San, Watashi ga Arimashita * Yajuu Keiji: Tokyo Douji Tahatsu Tero o Chinatsu Seyo!
Australia * Doodle Hex * Imagine Fashion Model * My Secret World * Star Wars: The Force Unleashed
I had this exact same problem happen with SmackDown vs. Raw 2007, and I wound up destroying my PS2 trying to fix it. Apparently there's something with the disc that just doesn't like the old PS2s, and they won't play.