Other mistake: In the Street Fighter collaboration, great care was placed replicating the Street Fighter II arcade selection screen, but the positions of the characters (originals and stand-ins) are all wrong.
Other mistake: In the presentation screen of the New Year Event, Nakoruru's name is misspelled as "Nakolulu."
Other mistake: During the KoF 2002 storyline, multiple times (would be redundant to enumerate them) there is no proper distinction in the text formatting between what the main character thinks acting as narrator, and what he actually communicates to the other characters as in-world dialogue. For the most part with rare hiccups, in the previous parts of the Story Mode the distinction was clear, with the thoughts being enclosed between parentheses.
Other mistake: In the KOF99 story mode, the protagonist knows Kula Diamond's name before it is revealed to them.
Other mistake: The example screen with the Time Attack results shows wildly unrealistic results - you can't clear 2-3 stages from enemies in 13 seconds, unless you use cheating programs. It takes longer than that just to walk from start to finish.
Other mistake: When you pull Terry Bogard in his King of Fighters XII version, his quote says "I don't know about 'legendary' means."
Other mistake: The quote you get when you pull Benimaru '99 from the gacha summon is "Don't go too rough on a beautiful lady." Benimaru is a cisgender man.
Other mistake: The description of the Memory item says; "It can be used for different a Fighter's awakening."
Other mistake: Amongst the various generic enemies you can face, there are construction workers with a "New York City" print shirt. The character model mirrors when they face left, including the writing on the shirt.
Other mistake: In the WWE event, Seth Rollins, Becky Lynch and co. face off against the female team. Yuri Sakazaki in the story uses lines (references to the Lilien Knights and disdain for cops) that are blatantly not written for her, but for the character of Bonne Jenet.
Other mistake: One of the roulette events of the game is called "Serena's roulette", but the name of the character is Serina, as shown plenty of times during story mode when she is an interviewer.
Other mistake: In "Failing defense" (Chapter 6 of Kof97), the protagonist, grateful for the fight that gives him the excuse to stop carrying the surprisingly heavy sidekick, says that he should "be" lunch to them. (instead of course, of "buy").
Other mistake: One of the available relationships between characters is called "Leona approved weakling team." The description says that it increases ATK and then "deals additional damage equal to 3% of damage dealt upon attacking Leona", but it can't be right, simply because Leona is not part of that team! "Leona-approved" is simply a flavour text as she is story-wise the one who puts those potential members in that particular tier.
Other mistake: The railroad background seen at the beginning of KoF96 has a sign saying "Railroad CROSED."
Other mistake: The picture icon used to display King of Fighters 95 in Story mode (stage selection, waiting screens etc.) is, of all the possible teams, of a team that the protagonist does not meet at all in that year. By contrast, KoF 94 shows Kyo Kusanagi's team Japan and KoF 96 the Boss team led by Geese Howard, those are logical choices the protagonist interacts with and have influence on the story - the Psycho Soldiers team is not even mentioned in KoF 95.
Other mistake: At the beginning of the stage ending with the Women's team boss fight in KOF95, the protagonist says "I'm starting no matter how many times we beat them", missing presumably the words "to think." After beating up the goons, before the fight against King, the protagonist misses out on more words when they say "Yuri waved her at us", the safest assumption being that it was meant to be the "hand."
Other mistake: The text crawl in chapter 4 of KOF 95, after describing the "golden fur" of the Bogard brothers swaying in the wind, announces that "the tournament bell begin to toll" instead of begins.
Other mistake: When the protagonist defeats Mature ("Rugal's secretary") in the text description, there's a description; "Noah stated with an air of pride", etc. The text starts with a parenthesis that never closes.
Other mistake: In the pre-fight of Episode 3 of chapter 1 of KOF 94, "How to face a powerful enemy", the dialogue is mislabeled in the beginning, mixing Noah, the protagonists and "Mean Looking Man" in wrong order.
Other mistake: The Friends section has a "Friend List" tab, "Invite", etc. and a "Recieved" tab (should be "recEIved") in the banner at the bottom.