DNA & DHA is the first stage in Galapa-Goth.
This stage starts with a Two Can, and is followed by a second Two Can one minute later. When the castle is damaged, Bun Bun Black appears as the boss and Two Can, Le'noir and Tackey as support.
Stall the first Two-Can until you get enough money. When the boss appears, keep spamming Island Cat, Manic Island Cat and Dark Laser against the enemies. Time your Bahamut to inflict heavy damage against the Bun Bun Black and defeat the Two-Cans.