I have SMS and Metroid Prime on my memory card. I put in Animal Crossing to play and it says there is not enough room on the memory card. It says AC needs 57 blocks. I have a total of 59 blocks. I can only have 1 freaking game per memory card? Is that the way all GCN memory cards are, or just the one I have?

BTW, the one I have came with the GC. Is it just the size?