- Anvilicious: Each episode carries a moral, and they're went at with all the subtlety of throwing a cinder block at someone's head. Then again, that's probably the point, and the lessons are good for kids anyways.
- Award Snub: The show did get nominated at the Annies, but lost in its 2 categories to Ask the StoryBots and Tuca & Bertie.
- Awesome Art: The art style is clearly a tribute to such comic strips as Peanuts and Calvin and Hobbes, and the animation is pretty fluid.
- Awesome Music: The theme song is extremely catchy and manages to explain the premise of the show and get you excited for it.
- Ensemble Dark Horse: Helen Keller is the most popular of the historical heroes due to her adorable design and inspirational, heartwarming story. Of the main trio, Brad is the most popular because he's so relatable.
- Friendly Fandoms: With the Ready Jet Go!, Molly of Denali, and Let's Go Luna! fandoms, thanks to them all being well-written and educational modern PBS cartoons. It helps that Yadina from Xavier and Honey from Luna have the same VA - Zoe Hatz. Also, Brad is somewhat similar to Sean from Jet.
- Heartwarming Moments: Now with its own page.
- Moe: Thanks to the Super-Deformed art style and Black Bead Eyes that everyone has, all the child characters can come off as this. Shout out to Xavier, Yadina, and Brad, for having cute personalities to match their cute appearances.
- Periphery Demographic: The show already has a loyal teen and adult fanbase thanks to its clever writing and use of historical heroes. Even 4chan is fond of the show, and that speaks volumes.
- Some Anvils Need to Be Dropped:
- Heroes aren't reality TV stars or people who are famous for being famous. Real heroes are ordinary people who change the world. People who are kind and caring. People who made mistakes. People who struggled along the way, but kept on trying and achieved their goal. That's what makes a hero.
- Nobody is perfect. The show makes it clear that none of the heroes featured are perfect human beings whatsoever, as they are shown making mistakes, and there are even some that had made questionable decisions or said questionable things in real life. note But the show is about believing the best of everyone and remembering people for the good they put into the world.
- Squick: In "I Am George Washington", Yadina gets a crush on Kid!George Washington, but it comes off as somewhat cringeworthy rather than cute because George Washington eventually grew up, married someone else, and died, so essentially Yadina is crushing on a dead person.
- Tear Jerker: Now with its own page.
- They Wasted a Perfectly Good Plot: They missed the chance to make a Hamilton reference in "I Am Alexander Hamilton."
- Toy Ship: Some people ship Yadina/Brad, due to Opposites Attract.
- Uncanny Valley: The characters' huge mouths can come off as this to some people.
- Visual Effects of Awesome: The effects used when the kids travel through time are well-done and have a great color palette.
- The Woobie: It's pretty hard to not feel bad for Brad. He has very low self-esteem despite all his talents and accomplishments, has many allergies, and is always apprehensive to go back in time. Special mention to "I Am Susan B. Anthony" and "I Am Alexander Graham Bell". In the former, Xavier and Yadina won't let him have a vote on what will go where in the Secret Museum, and in the latter, he loses his voice, and Xavier and Yadina won't listen to him.
YMMV / Xavier Riddle and the Secret Museum