At the title screen, hold L1 + R2 + L3, then press Start. If you entered the code correctly, you will hear a sound. Alternately, successfully complete the game in story mode.
Gundam At the title screen
Hold L1 + L2 + L3, then press Start. If you entered the code correctly, you will hear a sound. Alternately, successfully complete the game in story mode.
Hard difficulty setting
At the title screen, hold R1 + L2 + R3, then press Start. If you entered the code correctly, you will hear a sound. Alternately, successfully complete the game in full member mode.
Hyaku Shiki At the title screen
Hold R1 + R2 + R3, then press Start. If you entered the code correctly, you will hear a sound. Alternately, successfully complete the game in full member mode.