Have a saved game file from the demo version of Gundam Assault Survive. Create a character. Go to the shop and select the "Secret" option. Purchase the item that costs 0G to get 250,000G.
Have a saved game file from Gundam Battle Tactics, Gundam Battle Chronicle, or Gundam Battle Universe. Go to the shop and select the "Secret" option. Purchase the items that cost 0G to get 100,000G for each of them.
Buy the development plan of Guaiz Custom. Equip normal GuaiZ with Reserve Magazine parts that cost 582,000 (S-type). Upgrade the normal GuaiZ until it reaches 4500 TP. Then, go to the shop to purchase the GuaiZ Custom.
Complete mission 18 "Owaranai Ashita he EX" and use Kira (Zaft) five times. Note: Kira (Zaft) does not have to pilot Aile Strike. Then, select Vs. Battle mode and set the time limit to 1 minute. Have Kira (Zaft) as your pilot five times.