The iSmart team have released a fix to make Kirby Mass Attack work in their iSmart MM card.

Games fixed:
Fix for Kirby Mass Attack(U) (clean mode enabled, you will need a fast microSD)

Instruction:

1. Download the file.
2. Unzip it to your local hard drive.
3. Replace the two files (ndspatch.dat, savemode.dat under the folder _ismart) to your TF.

Download iSmart MM Game Patch