Defeat an EX character in survival mode. Then, hold L2 when choosing that fighter at the character selection screen to play as the EX version. Alternately, successfully complete 30 missions.
Defeat an SP character in survival mode. Then, hold L1 when choosing that fighter at the character selection screen to play as the SP version. Alternately, successfully complete 80 missions.
Highlight the "Arcade" or "M.O.M." mode options, then hold L1 while selecting it. You will fight against gold opponents in that mode.
Highlight the "Arcade" or "M.O.M." mode options, then hold L2 while selecting it. You will fight against EX opponents in that mode.
Highlight the "Arcade" or "M.O.M." mode options, then hold L1 + L2 while selecting it. You will fight against EX opponents in that mode.
Successfully complete 50 missions to unlock Kliff.
Successfully complete 50 missions to unlock Justice.
Successfully complete 70 missions to unlock GGX and GGXX mode.
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