Blank Cards

Blank Cards, or Wave Command Cards, are special cards obtained in MegaMan Star Force 2. The blank cards are obtained through side quests and throughout the Wave World, and can be used to many things, such as power ups or entering specific codes in the Wave Command Blank Card to make them to Battle Cards.

Trivia
When entering a code which makes Mega Man into Tribe King, the commands resemble the emblem on Geo's shirt or Mega Man's emblem, which looks like a shooting star.