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.