In "The Hero", James Marsden voices a prince who's not that bright, but still makes the effort to save a princess. In a Disney production, sort of spoofing itself. Sound familiar, Enchanted fans?
The Insurgent Generals from "The Big Job" are a parody of military heroes like The A-Team—with an original member of the A-Team in the form of Dwight Schultz (aka "Howlin' Mad" Murdock) as Wild Card.
The cartoon shown at the ending of "The Cartoon" has a two fold example. It's partly a mystery cartoon, hence why Frank Welker voices the narrator. We also have Jason Ritter voicing an awkward and intelligent young boy, Kristen Schaal voicing a young excitable girl, and Alex Hirsch voicing both a cool, laid back dog and a grumpy but nice old man. Where did the crew get that idea?
Channel Hop: Disney XD got episode premieres from March 2014 onwards. Disney Channel got the episodes several weeks later. By the time Season 2 began, Disney Channel discontinued the show and is now considered a Disney XD original series.
Colbert Bump: Most fans probably never heard of the Two Man Gentlemen Band before they were hired to compose the show's music.
The 1967 Croatian animated series, Professor Balthazar, also got one as it was a key influence to Wander Over yonder's art style.
Development Gag: In "The Void" two of the doors have early sketches of Wander and Sylvia.
Descended Creator: Craig revealed in a tweet that the live action arm that knocks the Lord Hater toy into the stack of blocks in the season 2 promo was him.
On top of that, Craig also provides the voice of Destructor's Sock in a few episodes.
Word of God states that the show was going to have a continuity and more complex stories told in 22-minutes long episodes, but Disney XD wanted a 11-minutes long gag series.
Even more so, Craig wanted the third season to have a lot more story lines and more developed backstory, but Disney canned the series because "80 episodes were enough".note And the implications of this phrase just seems to make it worse. In Frank Angones' FAQ post about the cancellation, he speculates that what that phrase meant was that the execs noticed that Wander did a lot better ratings-wise in reruns than during premieres, and that "80 episodes was enough" because they could cut costs by constantly re-airing the series instead of paying for new episodes.
Flip-Flop of God: The show's crew like to keep in touch with the fanbase through tumblr, and often answers questions they might have. However, often times, different crew members may give different answers for the same question, leading to some confusion. One notable example is the question of whether or not Lil' Bits is an actual evil kitten or an adult posing as a kitten.
Official Fan-Submitted Content: Many of the names of the villains on the Galactic Villain Leaderboard, kept track of by story editor Frank Angones on his blog are original characters created by fans.
In "The Buddies", Hater's "something something something" during the Friendship Song was originally a placeholder until the creators agreed to keep it.
This is the reason Sam Riegel is the voice of Emperor Awesome. When Will Arnett couldn't commit to the role, Riegel, who had already made a scratch track for the character became his permanent voice.
Schedule Slip: The show has premiered 9 half-hours worth in a little over 7 months.
The show didn't get its 3rd season, not because of low ratings, but because higher-ups decided that 80 episodes (over 3 years) was enough for one series, which fans of the show did not take well. What made this baffling is that said higher-ups were willing to wait for Alex Hirsch to see if he would change his mind on doing one more season of Gravity Falls (to which he declined and ended the series after two seasons after 4 years) but wasn't willing to give the same courtesy to Craig despite both shows being top-rated of the network. Most suspect it was cast aside to make way for the newer toons incoming on the channel at the time (namely DuckTales (2017), Marvel's Spider-Man and the Big Hero 6 TV series note Notable all brand names) as a cost saving measure.
The channel jump from Disney Channel to Disney XD didn't help matters either. Not everyone has XD, and Wander was barely advertised on Disney Channel once it made the jump; anyone would think Disney had it out for this show. Shortly after ending, it was pulled from rotation on the network and not rerun at all.note Running said reruns was the supposed reason why it didn't get renewed in the first place.
Even when Disney+ launched, the show continued to get the short end of the stick, not being on the service until a year and a half later on May 7, 2021. (This was mainly because the series was already on Hulu, which is also owned by Disney.) Now that it's on Disney+, the episode descriptions are each one short sentence long, and don't do much to describe the plots of the episodes at all.
Sending Stuff to Save the Show: Almost immediately after the staff announced that the second season would be the last, a "Save Wander over Yonder" fan campaign started gaining ground, and people started emailing Disney for a third season.
Short Run in Peru: France got "The Hero/The Birthday Boy" a few days before the US did. Latin America also got a handful of episodes the weekend before their US airings too. More infamously, The Netherlands got "The Liar/The Stray" first.
Word of Gay: The show's writers have confirmed that Emperor Awesome is omnisexual, Sourdough the Evil Sandwich is genderfluid, and Lord Dominator was seen as being a lesbian. Everyone else's gender identities and sexual orientations, however, are open to fan interpretation (including Lord Dominator's, as her being a lesbian was simply what the crew had in mind when it came to her and in-canon she comes off more as not really caring about romance at all.)
The crew keep in very close touch with the fandom over Tumblr, often dropping hints and trivia regarding episodes of the show. (See above)
In "The Battle Royale", McCracken said Something the So-and-So's long-winded talk was added because the episode was too short and they needed more time.
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