The official release of WWE '12, which introduced the brand-new "Predator Technology" engine for more fluid animations, is only available on: PlayStation 3 Nintendo Wii Why You See "PS2 ROMs" Online
Since you cannot find a WWE 12 PS2 ROM , you have two superior options: playing the actual console versions via emulation, or playing the best PS2 wrestling game ever made. Wwe 12 Ps2 Rom