Kirby's Dreamland uses MetaFortress, so you'd need to disable the USBLoader GX's 480p patch in the per game settings
Regarding the motion games, you need to watch the motion+ video once on the console (for any game) before being able to play any motion plus games. Often the video gets removed from rips, if for example you use WiiBackupManager and have instructed it to keep the game partition only. Easiest solution, if you have an original copy of wii sports resort or another game with the motion+, just launch it, watch the motion+ video one time, then all your motion+ games should work via a usbloader