Complete Monster: Dr. Jango is a rival to Professor Hiroshi Amano and has an unhealthy obsession towards evil and the ambition to rule over other humans and make them suffer to prove his superiority. Not content with just stealing Amano's works, modifying them for evil purposes, and using them for destructive pettiness, he willingly partnered with Draias and enabled all of Draias's evil acts with glee, having Draias enable his evil acts, trampling fellow humans, and delighting in their suffering; he would even try to usurp Draias if the opportunity presented itself. Absolutely shameless and lacking excuses about his atrocities against his own kind and only selfishly concerned of having him stand on the top of everyone else, Dr. Jango is a prime example of a thoroughly despicable human being in the entire franchise.
Evil Is Cool: He may be fearsome and cruel, but Draias earns plenty of fans with his great design, sheer power and effectiveness as a villain.
Memetic Mutation: Is this a pigeon?explanation A scene of Yutaro erroneously identifying a butterfly as a pigeon. On Tumblr, the quote, along with a reaction image of the scene featuring the English subtitle, is widely used to express utter confusion. The meme later saw a resurgence in 2018, usually to mock someone who's falsely identifying something like Yutaro does.
Stock Footage Failure: Katori's transformation/fusion into his Fighbird form doesn't blend in too well in the earlier episodes. Case in point; episode 2, which still shows the transformation. When Katori is on a cruise liner. In the middle of the ocean.