Brain Percentages (Teen Titans Go!)

Brain Percentages is the twenty-fourth episode of the fourth season of Teen Titans Go! and the one-hundred-eighty-first overall episode of the series.

Plot
Beast Boy starts using more than 10% of his brain to find the hidden images in a puzzle.

Why It Can't Use 100% Of Brain Percentage

 * 1) The episode is purely filler; Beast Boy struggles to look for the dolphin, so he goes through different strategies to help him find it when the dolphin had given way right in the puzzle book the entire time. All he had to do was look at the palm tree and that was it. He could've done that so he wouldn't have to go through using more than 10% of his brain for stupid things. Even a young child would've found the dolphin faster than him and not have problems.
 * 2) *And speaking of Beast Boy, he is very annoying in this episode, as even the rest of the Titans could spot the dolphin and try to help him. However, he insists them not to and wastes the rest of the episode trying to figure out where the dolphin is.
 * 3) The scene that shows a poster of the original Teen Titans reading "Teen Titans Season 6 Coming Soon" after Starfire worries if TV shows, books, and movies would say anything untrue proves once again that the show likes to insult fans of the original series.
 * 4) This episode uses the old and overdone "put it on my bill" joke.
 * 5) Beast Boy uses 50% of his brain to... tell truths to the Titans that hurts their self-esteem. Yeah, that's REALLY gonna help you solve the puzzle, isn't it?
 * 6) *Besides, he was undoubtedly wrong about the truth about Starfire being the only alien on Earth (unless he meant the truth on Tamaranian terms). Superman and Supergirl were born on Krypton and lived there until their world got destroyed, which makes them extraterrestrial beings. Definitely makes you 50% smart not telling her all that, huh?
 * 7) Lame ending: The dolphin ends up slapping Beast Boy on the face and he manages to solve the puzzle. The Titans then get taken back to Beast Boy's room, only for him to attempt to "solve" another obvious puzzle that takes them right back to the puzzle book. This time is a generic labyrinth (you know, the labyrinth on papers of the type "help the butterfly reach the little flower" or "help the mouse find the lost cheese"), all topped off by the bad jokes of the Titans and horrible mutant sewer rats.
 * 8) The common myth that humans only use a certain percentage of their brains isn't even true. They use all of it. Yet this episode perpetuates this.

Redeeming Qualities

 * 1) Cyborg at least does have a good point about the brain usage myth.
 * 2) The live-action scene where Beast Boy does the disappearing coin trick was decent.
 * 3) Beast Boy's transformation into a computer was kind of cool, admittedly.
 * 4) The soundtracks are fine.