Do you have to have 2 game cards for multiplayer in Fairy Tail Gekitotsu kardia Daiseidou?

Yes, in "Fairy Tail: Gekitotsu Kardia Daiseidou," you need two game cards for multiplayer mode when playing on the Nintendo DS. This allows two players to connect and enjoy the game together. If you're playing in single-player mode, only one game card is required.