Unlock the following Hidden Elements by performing the corresponding tasks. They can be activated at the "Elebits Notes" option in Extras mode:
HIDDEN ELEMENT - HOW TO UNLOCK Aroma Unit - Get the "King Of Surveillance" rank after you beat the final Boss. Berserk Elebits - Get the "King Of Capture" rank after you beat the final Boss. Extreme Silence - Get the "King Of Noise" rank after you beat the final Boss. High Power Mode - Beat the third Boss and then watch the intermission sequence. Limit Release - Beat 25 Challenge missions. Main Unit Only - Beat 5 Challenge missions. Permanent Homing Laser - Beat 20 Challenge missions. Permanent Vacuum Laser - Earn 25 "S" ranks in Normal Mission mode.