This is the second OK K.O.! crossover with other Cartoon Network/Warner Bros. (Steven Universe in particular) but the first one to be a movie.
Kermit the Frog from The Muppets makes a cameo in this movie.
In addition to him appearing, other lookalikes of Muppet characters are seen as well.
King Ghidorah, one of the most famous kaiju in the Godzilla franchise, was one of the monsters and villains living in the apartment building. This could be a reference on how typically Asian people (Japanese ones in particular) live in foreign (American ones) apartments at Metropolitan areas like those in New York City (especially with Brooklyn and Manhattan), Tampa, Chicago, Atlanta, Denver, New Orleans, Miami, Los Angeles, Sacramento, San Diego, Detroit, Jacksonville, Cleveland, Seattle, Boston, Honolulu, Cambridge, and Philadelphia.
In addition, a lookalike of Camera makes an appearance. Caricatures of Goro and Sheeva are also seen, albeit with them being more Human looking appearances.
There are some soundtracks from SpongeBob SquarePants of the funny parts.
Unlike the series Steven Universe, Jasper finally becomes a protagonist in the movie instead of an antagonist.
The roar Jasper makes has the roar from the T-Rex in Jurassic Park.
Mega Celestial Maia first appears in the OK K.O.! Let's Be Heroes! crossover.
OK K.O.! Jasper and Me provides examples of:
Actor Allusion - Jasper and Darkseid battled against each other, like Godzilla and Monster X/Keizer Ghidorah did.
All For Nothing - The villains are appreciated with Jasper as a villain, but turns out that Jasper has betrayed them and turned against her.
Amusing Injuries - Pizza Steve after being eaten alive.
Art Shift - The flashback parts has some Animesque chibi features and references from other media.
Back From the Dead - Jasper has survive the explosion and reunites with everyone.
Badass Crew - The main team has K.O., Garnet, Ben, Raven, and Mega Celestial Maia.
Jasper has joined the main team, for the very first time.
All the heroes have join forces to stop this evil menace once and for all.
Battle Cry - K.O.: POWER FIIIIST!!!
K.O. and Jasper: CHAAAAAAARGE!!!
Berserk Button - Never make Jasper angry.
Broken Tears - K.O. breaks down tearfully after thinking he lost his very best friend and everyone around him comforts him.
The Cameo - Rizzo the Rat from The Muppets makes a cameo in this movie, where in the zoo, he eats rat poison, and dies.
Chase Scene - All the villains chased K.O. and Jasper in Mount Massive Asylum.
Crossover - This takes place in CN City where K.O. attempts to go reunite with Garnet, Raven, and Ben.
This counts Mega Celestial Maia as the new member of K.O.'s team of the OK K.O.! crossovers.
Diving Save - Maia grabs K.O. to get out of the way to avoid being hit by the police car.
Darker and Edgier - When K.O. was in Mount Massive Asylum, he enters the section of Variants and Chris Walker.
Does This Remind You of Anything? - K.O. and Jasper were inside Prehistoric Park, which it similar to the docu-fiction television mini-series, Prehistoric Park.
Distressed Dude - Jasper fought against Bebop and Rocksteady, when they chase K.O. in the Prison Cell.
Full-Name Ultimatum - Carol calling K.O. by his full name when he got caught socializing with Jasper.
Get Out! - Lord Boxman shouts this at Radicles then pushes the button to eject him out of Boxmore.
Heel-Face Turn - Jasper has finally became a heroic person and make friends with other heroes.
Heroic Sacrifice - Jasper attempts to sacrifice herself in order to save everyone.
Kaiju - King Ghidorah appears in one of the monsters and villains' rooms, when K.O. opens the first door, looking for Jasper.
I Don't Want to Ruin Our Friendship - K.O. attempts to keep Jasper away from all his friends, so no one could know that K.O.'s making friends with Jasper.
Jerk With a Heart of Gold - Jasper as an example to be a mean-spirited gem but protects K.O. and her friends.
Jasper rescues K.O. and beats the crap out of the two vicious monsters.
Masculine Girl, Feminine Boy - K.O. is the feminine boy and Jasper is the masculine of K.O.'s.
Never My Fault - Jasper and K.O. got into an argument, but K.O. tells her that Jasper has almost crushed him and Enid and Radicles showed up to save him, which makes her realize it.
Rapid-Fire "Shut Up!" - Amethyst says this to Dendy about talking about the relationship between her and Jasper.
Reality Ensues - When K.O. tries to sneak out from Jasper, the ceiling breaks, causing him to fall onto the ground, getting Jasper's attention.
Screw the Rules, I'm Doing What's Right! - K.O. has had enough of this menace, he has to go find Jasper and turned her into a good person.
Shout-Out - Some characters from Outlast.
The Sociopath - Jasper as an example until the ending.
Darkseid and the villains attempting to destroy CN City.
Chris Walker attempts to kill K.O..
Time Bomb - Darkseid has set up the time bomb which it'll explode Mount Massive Asylum.
We Can Rule Together - Lord Boxman and his family join forces with Darkseid and his gang, in order to destroy CN City for good.
Wham Line - "Lardball!"
You Are Not Alone - Jasper wants to be alone because she never had any friends and doesn't need them, but K.O. will be the only person who will be by her side as her new best friend.
Patrick Warburton guest stars as Superman
Idris Elba guest stars as Darkseid
Carol was in tears after thinking about her son missing.
Carol cries over her son's captured.
K.O. breaking down when Jasper sacrifices herself, but came back alive.
As K.O. and Jasper are chased by an enraged Carol and the crew, Jonny 2x4 is lassoed into the horizon before exploding.
At the scene of Lord Boxman, his children, Professor Venomous, and Fink, entered Mount Massive Asylum, they introduced the villains, but Bane grabs Lord Boxman by the shirt and Lord Boxman claims that they're villains when he drops him.
Cyborg and Beast Boy's snowball fight. Particularly when they hit Radicles.
Throughout the whole movie, K.O. helps Jasper by becoming a good person instead of being evil.
Jasper siding with the good guys is part of a Heel-Face Turn.
K.O. and Jasper are enjoying some food at the T-Rex Cafe in Prehistoric Park in CN Zoo.
K.O. returns back to CN City and reunites with his friends.
Radicles and Enid reunites with K.O., after saving him from being squashed by Jasper.
K.O. and Jasper reunite with other heroes along with Justice League.
When K.O., was eating at the restaurant, Jasper comes and scares the living hell in front of everyone and eats Pizza Steve Alive.
There's also a nightmare factory of the movie. The scene where K.O. enters the condemned Mount Massive Asylum to find Jasper. The first two doors are rather silly, but when he opens the third door, he sees a girl playing the violin, which K.O. likes. She soon turns around and goes scary bitch mode on K.O., revealing a freaky demonic face with a massive toothy mouth and vein eyeballs way too big for their sockets, letting out a bellowing roar at him the entire time.
Being discovered by the enemies makes things a really fast and intense game of cat and mouse. It's scary because you have no idea where you are going, where's safe to hide, and where the items are.
Those Two Bad Guys, who stand naked in front of K.O. (complete with uncensored genitals) calmly talk about how they'd love to kill him slowly and take various parts of him. You might be able to control how badly this freaks you out until you have to escape from both of them.