I was watching this video which shows the similarities between both characters. I suppose it must be a kind of tribute, or maybe is just a vile copy (I don't think so). Anyone knows the reason?
and K9999 (pronounced K Four-Nine), a clone from Kyo entirely based on Tetsuo Shima from Akira, able to transform his arm into a long tentacle like Tetsuo's. Due to copyright issues, for the King of Fighters 2002 remake he was replaced with a similar character.
but gives no sources.
K9999 won't appear in any future games because
SNK hates the character
He is a liable lawsuit in which the creators of Akira could sue SNK Playmore
Elioth, a Korean company helped co-create King of Fighters 2001 and owns the rights to him
He was replaced in KoF 2002 Unlimited Match with a character called "nameless" who looks like Black Jack from the anime.
I think K9999 is the 9999th android of "K" because it disappeared, looking for the nests hideout and destroy it because they killed the original "K" who's real name is Kryzalid.
Tetsuo Shima is just a kid who grew up poor and turned into a mutant by Akira and put into an Akira Institute, and he escaped not knowing that his infected arm must be kept stable and that's why he ended up transformed into a huge mutated ugly monster and just died.