Here is an overview of Glitch Mode, via Idea Factory International:
Whenever a party member touches a “Field Bug” or is attacked, their “Corruption Level” increases. When your party member’s Corruption Level exceeds a certain threshold, your party member will transform into “Glitch Mode” where they obtain God-Level abilities! But be wary of over-extending your party member’s Corruption Level! Once your Corruption Level surpasses a certain limit, your characters will be unable to move entirely, and if they fall and are revived in battle, they’ll come back with status ailments! Utilize Glitch Mode to your advantage!
View the screenshots at the gallery.