How do you unlock lady x subsistence in Rumble Roses XX?

Once seven characters have held the championship belt, two Reward matches will appear sequentially in the arena. If the sixth character to hold the belt was a face character, there will be three Reward matches. You must first defeat and unlock their heel alter ego on the Skyscraper.

Lady X: Defeat Lady X in the Reward Match to unlock Lady X for purchase in the shop for 20,000 under "Others".

Lady X Subsistence: Defeat the tag team of Lady X and Dr. Anesthesia in a Handicapped match to unlock Lady X Subsistence for purchase in the shop for 30,000 under "Others".