I finally unlocked it, and... HOLY &¤#"F***ING SHIT! I got my ass kicked so fast it made my head spin. Before I could even get my feet on the ground, two aces cornered me and killed me 4 times in a row for a game over. The next time, I managed to get as far as the missile-base, where I took out the Musha Gundam with a level-3 SP-attack... only to be killed 4 times in a row by the Musha MK2, which is capable of offing me in 2 hits flat.
How is this even supposed to be POSSIBLE?!?