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 Original Research/Other 

The article mentions some details about the combos, as well as character storylines.  Although these things do seem accurate, a lot of material seems to have been written by someone familiar with the game and doesn't cite the source.  Perhaps a simple sentence, like ""The arcade included the following descriptions"" would be more precise.  Meltdown's name is probably able to be cited from a Nintendo Power.

Winning the game with Eyedol does have an ending storyline that clearly parodies Blanka from Street Fighter II.  Another note is that the SNES version had a different ending (saying something about Eyedol's bracelet) whereas the arcade version mentioned the club.

Some notable game play features: I think the sky stage is perhaps noteworthy, as it could lead to some very short games on the arcade (although the Tekken series was known to have even faster fights).  Also, in the arcade Eyedol had a notably easy infinite combo (when the opponent was at the edge of a stage), plus a much more difficult infinite combo (running back and forth), and the SNES version didn't have these things.

The comment above about tapping a low button might be referring to the easy repeatable combos in KI2, which would be another game.

KI1 and KI2 used the exact same motherboard (the model # / name / whatever was identical on both motherboards), and the software was different only by the chips installed in the motherboard and the hard drive.  (Surprising, perhaps, considering how different the games graphical feels look from each other.)  These games used the Ultra 64 hardware, which was the correct name for the hardware at the time of KI1's release.  Rare had said (in some unofficial strategy guide) that they had no concerns/reason-to-worry about KI Gold matching the performance of KI2, making some smart remark about those concerns only being needed when moving to a less powerful machine.  (KI Gold was initially also going to have more characters, but the memory limitations of the cartridge later proved to prevent this.)  Therefore, it's not out of line to think that the N64 is really significantly different than the Ultra 64, other than the lack of the hard drive.  Cruisin' USA is known to use some other motherboard, and reference the Ultra 64 just as an unrelated advertisement.

Bugs in the game could probably get their own section, including Orchid's attacking after turning into a frog, opponents shrinking with Thunder's combo, Riptor being unable to get a high hitting combo when the Ultra misses, and the fight being able to continue on after Orchid initiates her Ultra (if initiated after hitting the opponent into the air and then backflipping, and having the opponent hit her out of the Ultra)."