This is a playthrough using 2nd form Krizalid as a proper boss status character in the Arcade version of King of Fighters '99. Read on below for more information...
2nd form Krizalid is the main final boss. He is a non-selectable character in all three Neo-Geo versions of the game (MVS, AES and NGCD).
His status can be set up (through third party methods) for a human player to play him just like the CPU Krizalid you fight against at the end of the game. By doing it this way, you get some unique features which would normally not be available if you had selected him as a "separate" character, as follows:
===== BOSS FEATURES =====
---- On the Order Select screen, he has the large CPU boss status image portrait meaning that you don't need to select the order.
---- It is perhaps somewhat surprising that 2nd form Krizalid should use his 1st form portrait image on the Order Select screen while in this boss status.
---- Because he is in boss status, it means that the player only gets one character (Krizalid) to use, making him a lone character.
---- As he is in lone boss status, he does not have a Striker. This of course means that in the gameplay screen, there are no Striker nor Stock icons at the bottom of his side of the screen.
---- As he is in lone boss status, it means that in the gameplay screen there are no other "team member" names under his lifebar.
---- As he is in lone boss status, it means that before the Winning screen comes up (assuming you win a match), there are no other "team member" portrait flashes.
---- Playing as him in this manner also affects the way the CPU opponents are displayed on the Next Competitor screen.
---- Playing as him in this boss status will give you the Hero Team's story dialogues and endings.
---- After you beat the game with him in this status, the cutscene of him running is glitched in a way that there are only two of him, and they are both in glitched colours.
===== ABOUT 2ND FORM KRIZALID =====
---- His image portrait is a black silhouette, and this is normal. When he appears on the character select screen (he is not supposed to), it is also a black silhouette.
---- On the character select screen, after you select 2nd form Krizalid, his icon at the bottom appears as Maxima's character grid icon with glitched colours. The icon also doesn't fill up the box obviously.
---- Same as above on the Order Select screen. The strange thing is that if you reveal your order selection (by holding Start as you confirm the order) at the bottom, his Maxima icon will have different glitched colours.
---- On the VS screen, when he is part of a Team, his banner image is "empty".
---- In gameplay as the active character, he has proper animations when using Strikers.
---- In gameplay, if he is an inactive character or Striker, his name text is misspelt as "KRIZARID".
---- In gameplay, when he is the Striker character, if you go all the way to the left-end of the screen and use him as a Striker, he appears standing half-off-screen to the left, and does nothing. Despite this, there is actually a resource effect that happens, and this effect is that it grants the player loads of extra Striker stocks/usages... which is useless given that Striker Krizalid doesn't do anything.
---- In gameplay, if he is a Striker, he actually has a proper Striker icon image at the bottom, despite being a non-selectable character in this version of the game.
---- Despite being a non-selectable character, his gameplay sprites appear perfectly in the cut-scenes.
---- Despite being a non-selectable character in all NeoGeo versions of the game, he actually has an alternative colour palette.
---- In gameplay, he cannot crouch, but does have "Down + [X]" moves.
---- In gameplay, he has a ridiculous easy infinite combo.
---- In gameplay, he builds super meter/gauge ridiculously quickly.
---- He is not part of any "special teams" or "secret teams", meaning that if you beat the game with him, he does not have any endings.
---- There have been mentions/rumours that 2nd form Krizalid is selectable through the Roulette.