To get hidden power sword
Pause game and enter square,down,sqare,triangle,triangle,down,left,circle hold R1,L1,R2,L2 togther and press start
Submitted by tuffpup
Unlock Dizzy and Testament
For Testament beat the game with the very very Hard setting with least 90 of all characters and then he will appear in the player select screen. To get Dizzy beat survival and get to at least 80 kills and up. The 2 bosses should be selectable. You can also go to the Press Start screen and press Down, Right, Right, Up, Start
Unlock Guilty Gear Mode
Finish level 100 in survival mode.