''The King of Fighters '99
was the last KOF'' game with producer
Takashi Nishiyama due to issues with the company in 2000. Like the earlier games the artwork was done by
Shinkiro. The designs in general were retouched to give a cooler emphasis, most notably in K' as his sophisticated style is meant to breathe new life into the series. Eiji, one of the game's designers, commented that he thought K' would be more popular than he turned out to be, noting that K' was too plain. As the game was developed at the same time as SNK's
Garou: Mark of the Wolves, the protagonist's designer was fearing he was too similar to
Rock Howard which made him nervous. There were also similarities with Cool from the fighting game
The Fallen Angels as its designers moved to SNK to work in ''The King of Fighters '99
. Kyo and Iori were originally designed by Shinichi Morioka who had left Steel Hearts after The Fallen Angels
and upon returning to SNK for The King of Fighters '99'', he also created K' and Maxima. With the introduction of a new lead character, K', SNK had originally planned to remove main characters Kyo Kusanagi and Iori Yagami, who had previously appeared in earlier installments of the series, from ''The King of Fighters '99
. Instead, they ended up as unlockable hidden characters after fans responded negatively to their removal at location tests. Kyo and Iori were supposed to disappear due to business reasons or the requests of enthusiastic fans, but in the end they have continued to appear ever since. Kyo was involved in the story to some extent, but not Iori, in terms of the connections with the new protagonist. The same issue would happen in the third story arc, where Kyo and Iori are major characters opposing The King of Fighters 2003'' lead
Ash Crimson but more due to narrative intended reasons rather than fan demand. Kyo was redesigned for this game for the first time in the entire series replacing his school uniform with more casual clothing that were well received by the staff and fans. To contrast with the previous series' protagonist, Kyo, K' was designed to be the "dark hero". The staff wanted to create a Robo Army Team. This idea was abandoned, but they later created a tribute to it in
The King of Fighters 2000 by introducing
Rocky, a character from
Robo Army, as a Striker for Maxima. The character Whip was originally meant to appear in ''KOF '96'', but due to
Leona Heidern's introduction in that game, the staff decided to wait until ''KOF '99''. The large number of young characters appearing in the game represented a problem for the developers; as a result, the staff introduced older characters such as Seth and Vanessa to balance the game. Bao was added to reduce the average age of the Psycho Soldiers Team from 42 to 34. The boss character, Krizalid, was designed "with a straight, stylish appearance and earnest strength"; however, the designer in charge mentioned he "overdid it". Due to the large number of unused
graphics accumulated on the
Neo Geo version, some of Krizalid's graphics were removed. With the release of the Dreamcast port, the staff could add Krizalid's graphics because of the
console's capacity. Vanessa was meant to be a playable character, but due to time constraints, she was only a Striker in the Dreamcast port. Meanwhile, while Kyo and Iori are always written as rivals who interact before their matches begin, this time their exchanges were made to give a subtext of happiness as both fighters are happy to see each other manage to survive to the battle against the demon Orochi in the 1997 tournament. ==Release==