"The Birthday Boy" is the second part of the 9th episode of Wander Over Yonder.
It's Lord Hater’s birthday and Lord Hater hosts an event in his new Doom Arena in which he gets to defeat Wander and see him cower in fear. Wander wants to make the party more special and tries constantly to get Lord Hater to approve of his activities all while fruitlessly waiting for a smile from him.
Peepers blows a party blower at Lord Hater, wishing him a happy birthday and shows that he and the other Watchdogs chipped in and got him his own Doom Arena. But that's not all, and he states the next gift will be sure to get him happy, and reveals Wander and Sylvia in the arena, the former thanking him for inviting them to the party. Lord Hater instantly brightens and proclaims this is his best birthday ever, and has a monologue that what he wanted is to see his most despised enemy cower in fear. He then takes one look at Wander on the jumbotron and obviously sees he's not scared at all.
On the arena grounds, Sylvia attempts to escape, but Wander tells her the party isn't that bad but is poorly decorated. To his worry, Lord Hater is obviously not enjoying the party. He has a monologue similar to Lord Hater's earlier, stating that they need to stay and make sure Lord Hater has fun and replaces his frown with a smile.
Peepers initiates the first event: a myriad of Watchdogs clad in gladiator armor. Wander believes they're more party guests and wonders what they're gonna do for fun. Sylvia suspects they'll crush them into a fine paste, which gives Wander an idea. He asks her to make sure the Watchdog Gladiators don't see anything while he works, and she is proud to do so. She beats up the Watchdogs one by one, and Wander makes a piñata in the shape of Lord Hater's head. Sylvia leads the Watchdogs to the pinata, where they unknowingly burst it open and candy flies out, and they excitedly go for it, much to Lord Hater's anger. Peepers searches for another event but takes a long time, leaving Lord Hater to search for it himself.
Wander notices that Lord Hater wasn't happy with his idea, just as a giant laser shaped like a bottle rises out of the ground. Wander sees this as a Spin the Bottle game and is delighted that Lord Hater chose this. He has Sylvia kick the bottle while he sits on it, waiting for it to stop. The bottle lands on a Watchdog vendor in the stands, but Sylvia kicks it over to Lord Hater. Wander asks Lord Hater to pucker up and awaits for a smile from him, and blows a kiss just as the laser goes off. It ends up bursting away part of the box seat Lord Hater is in and burning him. Sylvia laughs at this, but Wander is sad that Lord Hater didn't smile at this.
Peepers tells Lord Hater that he's sorry the party isn't going as planned, and recommends "the big red button in the upper right corner". Lord Hater presses this, which releases a monster, Sylvia proclaiming this is no party game. She charges for the monster, but she gets beaten by it and thrown into the audience. Lord Hater mocks Wander that Sylvia is not there and wonders if he's scared, and prepares for the fear. The beast charges for Wander, who tames it with a pair of dog biscuits. The Watchdogs enjoy this, but return to their usual jeering when Lord Hater glares at them.
Lord Hater is angered that Wander has not even been scared throughout, which is what he wanted for his birthday, and he decides to do this himself. As he stomps into the arena, Sylvia knocks Peepers out, causing him to activate every button on the control panel which makes the lights change and every obstacle in the arena to show up. Wander takes Lord Hater on a wild run around the arena using the obstacles as party games: The bottle laser as Limbo, a bomb as Hot Potato, and a lava pit as Musical Chairs. Lord Hater fails at every one of them, and Wander challenges him to a race to the end, but stops just before the finish to let Lord Hater win at least once. The moment Lord Hater finishes, he gets beat up.
Lord Hater tiredly says to Wander that he should've been afraid, and Wander sadly explains he is, but adds he's afraid that Lord Hater is not enjoying the party. This gives him one more idea, and he knows how to save the party and finally get Lord Hater to smile. A celebratory musical number led by Wander follows, with Sylvia and the Watchdogs joining in eventually. During this, Lord Hater hesitates and finally gives in to Wander's idea and forces a smile onto his face, much to everyone's delight. Wander and Sylvia depart, happy that their work is done.
As Wander wishes Lord Hater a happy birthday, his face drops into a frown, ending the episode.
Hater, still with a frown, stays in his chair as Peepers cleans and whistles "Your Happy Birthday Song". After a while the monster arrives and roars at Hater before trying the cake, liking it instantly. Hater pets the monster and is then nearly eaten by it afterwards.
- "Doom Arena"
- "Your Happy Birthday Song"
Lord Hater: (Seeing Wander laugh and wave) Peepers! There is a distinct, lack of cowering in my Doom Arena! That is contrary, to the purpose...of...the Doom Arena!
Watchdog Gladiator: I really wish I had a second eye!
Wander: Spin the Bottle? (seductively) Hater, you sassy man! You do wanna get this party started!
Lord Hater: Peepers, Wander still appears to be enjoying himself. Now at the expense of my face!
Peepers: Don't worry sir, we have plenty of terrifying traps left. Hmm, let's see, Meat Tenderizer, Flamethrowers, Flying Tiger...
Wander: Sylvia, Hater is still not enjoying himself! (Pointing at his mouth) The corners of his mouth are still pointin' south! (He spins his mouth around, making it a smile) We gotta spin that grim into a grin!
- Running gags: Wander upset due to that Lord Hater's not smiling and Lord Hater getting harmed.
- This is the first time Lord Hater and Peepers are seen outside Lord Hater's ship for the entire episode, and the first time they are seen without the ship present.
- The fourth wall is broken four times:
- By Wander, who whispers to the audience, "The birthday boy does not appear to be enjoying the festivities."
- By Wander again, who paints the camera screen with paint.
- By Lord Hater, who stares at the screen after Wander tames the monster.
- By Wander a third time, who looks at the camera while saying, "Aw, the birthday boy should win at least one".
- The title refers to Lord Hater being referred to as "the birthday boy" by Wander. It also has to do with his birthday.
- This is the first episode in which a character's birthday is celebrated, in this case Lord Hater.
- This is also the first episode where Sylvia sings, and the first time she sings with Wander.
- This is the first episode to not show an overview of the episode's location nor zoom in on it at the beginning.
- It is revealed that every one of the Watchdogs wish for a second eye.
- This episode marks the first time Lord Hater and Wander each have their own plans for each other; in this case, Lord Hater wants to get Wander scared and see him cower in fear, while Wander wants to get Lord Hater happy and to see him smile. In addition, both plans are complete opposites of each other.
- This is the second time the Watchdogs enjoy the festivities thanks to Wander ("The Greatest").
- Wander calls Peepers "Mr. Peepers", like what he did in "The Prisoner".
- This is the second time Wander and Lord Hater compete against each other ("The Greatest").
- Second episode where one of Lord Hater's body parts eventually falls off, first was his arm in "The Greatest".
- Second time a flamethrower is mentioned ("The Hat").
- This is the third episode to not show an overview of a planet at the start nor take place on one. ("The Prisoner", "The Pet")
- Second episode to mention Wander's "goofy grin" ("The Little Guy").
- Wander's banjo head is dented in the center and has a star on the back, like what it looked like in "The Box". In other episodes, it's flat and has no star.
- The monster hides in the stands when all the obstacles come out, but in several establishing shots of the stands and arena, the monster isn't there.
- When Sylvia begins her solo, Lord Hater's arm overlaps her snout.
- When Wander sings "It's Your Happy Birthday" while hanging flags, his mouth isn't moving while he's singing.
- The chest Sylvia gets the cannon out of isn't seen in any shot before or after she uses it.
- Wander puts glitter on the piñata, but when he shows it later, it doesn't have any visible glitter on it.
- The bottle laser is on the far side of the arena, but when Sylvia spins it, it seems to be in the center.
- While Lord Hater is looking at the obstacles as they appear, Wander's mouth briefly turns purple.
- The flags Wander put up permanently disappear after just one shot of them.
- While Wander is shaking his bottom the third time he sings "Here's your happy birthday song", he turns around, but his feet are still facing front.
- When Wander wheels Lord Hater's birthday cake over to him, the balloons on either side of Lord Hater's throne are gone.
- When Lord Hater's throne gets shattered in half, the pattern on it changes between scenes.
- When Wander and Sylvia are about to leave after Lord Hater finally smiles, Lord Hater's eyes are white instead of green.
- Wander and Sylvia are on either side of Lord Hater after he forces a smile, but when the camera zooms back in as they leave, they are both on Lord Hater's right.
- When Lord Hater gets his cake, his arms are folded, but after he forces a smile his arms are at his sides.
- When the camera shows Wander as the monster stares at him, Wander's left leg is superimposed over the outline of his fur.
- When Wander is about to sing "It's your happy birthday" the third time, his upper hair strand briefly overlaps his right eye.
- When the camera zooms in on Lord Hater while Wander and Sylvia are singing beside him, Sylvia's rein is missing but reappears when she turns her head.
- Surprisingly, even though Lord Hater wants to see Wander get scared, he doesn't care about Sylvia getting scared at all nor does he try to get her scared. This could possibly mean that he doesn't care about scaring her as much as Wander.
- When Wander says "Just the pit monster!" the white circles on his banjo are brown and the inlays are white.
- Twice in the song, the back of Wander's banjo is darker in color.
- Wander plays the kazoo from the wrong end.
- During the close-up shot when Wander explains the real reason why he was afraid to Lord Hater, when he finishes talking his upper hair strand jerks upward a bit.
- The part when Sylvia tries to get the watch dogs to crash into the piñata her stale is gone.
- After the laser is shoot at Hater, his left light bolt is gone.
- In some scenes the watchdogs' hats are gone.
- When Wander spins his mouth with his hands, it overlaps his left eye.
- My Little Pony: Friendship is Magic - During the song, Sylvia uses a cannon that blasts party hats onto the Watchdogs, which references the party cannon used by Pinkie Pie on the show. The show was created by the Craig McCracken's wife, Lauren Faust, who also works on Wander Over Yonder.
- Looney Tunes- In the scene where the beast and Sylvia are fighting, the way in which the beast charges (with left-over footmarks jumping all over the place) and how he head-butts Sylvia causing her to nearly fly out of the arena is similar to a scene from the 1951 Looney Tunes short, Bully for Bugs.
- Wreck-It Ralph - While Wander is taming the monster, the background music sounds like the 8-bit music played when the game Fix-It Felix Jr. starts up.
- Peanuts - During Your Happy Birthday Song, at one point, Sylvia dances like Snoopy from Peanuts.
- Dragon Ball Z - The Doom Arena is similar to the "Otherworld Tournament".
- This episode was originally scheduled to air on Disney Channel on February 28, 2014, but was replaced with a Fish Hooks episode and held back. This episode aired on Disney Channel with "The Hero" on July 18, 2014.
- When this episode and The Hero aired on Disney Channel, it was part of Disney Channel's "Frozen Summer Weekend".
- This episode and "The Hero" aired on Craig McCracken's 43rd birthday.
- The first images for this episode were posted on Instagram during the Latin America recording.
- In France this episode is called, "Le Héros De La Fête".
- Note: In the Polish version of the animatic, Peepers does not whistle "Your Happy Birthday Song".
- "The Hero" and this episode got the lowest views of any episode (0.4 million), due to the show moving to Disney XD and most people don't have Disney XD.
- "The Hero" and this episode premiered part of Disney XD's "Show Me the Monday".
- Ten seconds of this episode was shown in Disney XD UK's Interactive Clip-'N'-Mix game.
- For those who do not feel like doing all that skipping, click here for the Disney XD UK Clip-'N'-Mix Interative Game to be opened up at the spot where this episode is shown.
- March 21st, 2014 (Disney Channel France)
- April 18th, 2014 (Disney XD Brazil and Latin America)
- June 28th, 2014 (Disney Channel Hungary)
- July 5th, 2014 (Disney XD Poland)
- September 7th, 2014 (Disney Channel Japan)
- September 7th, 2014 (Disney XD Canada)
- Jack McBrayer as Wander
- April Winchell as Sylvia
- Keith Ferguson as Lord Hater
- Tom Kenny as Peepers
- Jennifer Hale as Princess Demurra ♦
- James Marsden as Sir Brad Starlight ♦
- Fred Tatasciore as King Drakor ♦ and Pit Monster
- ♦ designates a character that did not appear in this episode