Power Rangers Ninja Storm/Fridge

Fridge Logic

 * If Lothor attacked the Thunder Ninja academy and captured the other students and their sensei, then why the hell would Blake and Hunter trust him, let alone believe a word that he said?
 * It's not brought up in show, but helped a lot it seemed.

Fridge Brilliance

 * The stripped-down Lightning Mode of the Storm Megazord doesn't last very long. You might wonder why they bothered, but this is a Merchandise Driven show. The mode with parts removed doesn't last very long, instead reverting back to the full mode, because this encourages young viewers and toy owners to not take the parts off the Megazord toy for very long and thus risk losing them.
 * Except that's not how the toys work. The toy can't turn into Lightning Mode, Lightning Mode is a seperate non-transforming toy of it's own.
 * Lothor says they can't attack the Rangers in their civilian form because a Ranger's powers can only be destroyed when they're in Ranger form. This makes sense, as if they just killed them, their powers could be given to someone else. Destroying the powers themselves is a much more effective way to permanently claim victory.
 * Sensei's body-swapping in Sensei Switcharoo offers a two-fold: first he's switched with Shane. When Sensei was a student, as shown in the Samurai's Journey trilogy, he was a student of the Air discipline; very fitting. However, when he ends up in Dustin's body, it adds a touch of irony, given that it was his brother Kiya (Lothor) who was an Earth discipline student.