"Got it memorized?" Explanation Axel's catchphrase in Kingdom Hearts II. Initially translated as "commit it to memory" in the original Chain of Memories, it's featured at least once in every game he appeared in, including the remake of Chain of Memories. The fandom's so crazy about it that Quinton Flynn's asked to say it at nearly every con he's in.
BEHOLD! BEHOLD! BEHOLD! BEHOLD! Explanation Kingdom Hearts 1 did not allow you to skip cutscenes. You have to watch a cutscene every time you die if you die at a boss. Many people died several times during the Maleficent fight. Nuff' said.
Ven's goldfish. Explanation From one of Xigbar's lines in 358/2 Days when he asks Xion, who he sees as Ven, "Do you always have to stare at me like I just drowned your goldfish?"
Terra's pants. Explanation Terra's hakama in Birth by Sleep are beloved by many fans.
Aqua's boobs. Explanation Aqua is by far the most well-endowed of the Kingdom Hearts females.
Vanitas's creepy-ass laugh. Explanation Vanitas's laugh, first heard in the game trailers, quickly caught on with the fans for its creepy awesomeness.
DARKNESS!!!Explanation The word "darkness" is said a lot throughout the games, particularly by Ansem in the first game. Do not attempt to make a drinking game out of it.
I'll have a CHICKEN MCDARKNESS!!!!!Explanation Inspired by the prevalence of the "DARKNESS" meme, one YouTube video showed Ansem ordering a fast food he made up and refusing to accept that it didn't exist. It... seems to have been pulled.
Sora, Donald and Goofy! Explanation Characters tend to refer to the three party members of Kingdom Hearts II by name. And always in the same order.
GET UP ON THE HYDRA'S BACK!!! Explanation Phil's piece of advice for Sora while fighting the Hydra in Kingdom Hearts II, repeated often.
The Meme That Never Was. Explanation The last level of Kingdom Hearts II is called "The World That Never Was". Individual rooms have names like "Altar of Nothing". Before then you had (mostly) cheerful Disney worlds, and then you get this.
"Roxas, that's a stick." Explanation At one point in 358 Days Over 2, Roxas and Xion are together on a mission and Roxas finds himself without a Keyblade. He picks up the first thing he sees to use as a weapon. Xion lampshades the ridiculousness with that line.
There are many videos on Youtube called "Roxas hates (X music)". They use the clip when Roxas smashes the lab's computer.
[Looking up to the sky as Dearly Beloved Plays] Sora! Explanation The secret ending of Birth By Sleep involves all the characters doing this.
The Xehafort! Explanation A pun on Xehanort, supposedly the place where the various Xehanorts hang out.