EX Characters
Once you beat a character in Survival Mode, you'll unlock its EX version. 
To select an EX character, highlight him/her, then press L2 at the 
character selection screen. 

Stage Select
To select a different stage, highlight a character and press R2.

Boss Stage Select
Select versus CPU, versus two player, or training mode. Highlight the ''Random'' character selection at the middle of the screen and press R2.

Ex and Sp/Black:
To get a persons Ex mode you can either unlock it in Servial mode(Every 10 lvls is 
a new Ex the daredevil is the Ex) or the way which i think is faster is to compelete 
the 1st & 2nd paths in story mode. To get the Sp form you just have to finish all 
three paths of a person. For black when you have the Sp of a person hold L1 then 
press start. Its for infinite specials.

Clear pause screen:
When in the pause menu in any mode, press Select to get a clear view without the 
shading or the menu. Press Start to resume game play or Select to return to the 
pause menu. 

Unlimited tension:
When choosing your character, make them SP then press Start. You will have 
unlimited tension throughout the match. 

Fight as Robo Ky:
Defeat Robo Ky in level 210 of survival mode. Alternately, complete all 60 story 
mode paths, successfully complete 40 missions, or accumulate 96 hours in training 
mode and normal game play. 

Fight as Kliff:
Defeat Kliff in level 220 of survival mode. Alternately, complete all 60 story mode 
paths, successfully complete 40 missions, or accumulate 96 hours in training mode 
and normal game play. 

Fight as Justice:
Defeat Justice in level 230 of survival mode. Alternately, complete all 60 story 
mode paths, successfully complete 40 missions, or accumulate 96 hours in training 
mode and normal game play. 

Fight SP opponents:
Hold L1 when selecting either Arcade or M.O.M. mode.

Fight EX opponents:
Hold L2 when selecting either Arcade or M.O.M. mode.

Fight SP and EX opponents:
Hold L1 + L2 when selecting either Arcade or M.O.M. mode.

Alternate costumes:
Press Square, Circle, Triangle, or R1 before pressing X to select your character. 
Note: Some characters' costumes do not change with Square.

Justice Story mode:
Complete all 60 story mode paths to access Justice's story mode.

Guilty Gear mode:
Complete all 60 story mode paths to unlock the "Guilty Gear Mode" option at the 
options screen. Alternately, accumulate over 58 hours of game play.

Dialogue select:
Hold Punch, Kick, or Slash after the versus screen disappears but before the stage 
loads to select the dialogue set for your character.

Alternate victory pose:
Hold Punch, Kick, or Slash after the victory message appears. Note: Not every 
character has a full set of alternate poses.

Faster credits:
Hold Punch, Kick, or Slash while the credits are displayed.

Slayer haiku:
Listen to Slayer's dialogue in the sound test screen and press Square.

Easy kills:
This trick requires a programmable controller. Program the "Instant Kill" move for 
the desired character and assign it to L3. While in a match, press Square, Triangle, 
X, Circle to switch to instant kill mode. When you have just finished a combo, after 
they get up quickly press L3. If timed correctly, you should kill your enemy with 
ease.