At Kao Lyn's laboratory, input the following to temporarily play these armours. These special armours do not appear normally and the code(s) will be required to unlock them each time you wish to play them

Captain Gundam
CIRCLE, SQUARE, TRIANGLE, CROSS, CROSS, TRIANGLE, SQUARE, CIRCLE, TRIANGLE, CIRCLE, SQUARE, CROSS.

Bakunetsumaru
TRIANGLE, CIRCLE, CROSS, TRIANGLE, CIRCLE, CROSS, TRIANGLE, CIRCLE, CROSS, TRIANGLE, CIRCLE, CIRCLE.

Winged Knight
TRIANGLE, TRIANGLE, CIRCLE, CIRCLE, CROSS, SQUARE, CROSS, SQUARE, CIRCLE, CROSS, TRIANGLE, SQUARE.