King Lion/Shishioh

Jack Abbot aka King Lion or Shishioh, alongside his counterpart King Leo/Shin Shishioh are the main antagonists of Savage Reign and Kizuna Encounter.

Profile
He is the impersonator of King Leo. He participates in the tournament on the latter's orders and uses the name King Lion as an element of intimidation. However, he really wants to take the city for himself and plans to overthrow the original crime lord. In his ending to the games, he takes over the futuristic city with an iron fist.

Crossover Appearences
Neo Geo 2: Match of the century

He is one of the bosses alongside Goodman, Antonov and Nova.

Capcom vs SNK 3: Fighters' Spirit

He appears as a playable character on this sequel.

SNK vs Capcom 3: Unlimited Combats

King Lion appears facing Savage Reign series alongside Sho Hayate and Rosa.

Capcom vs. SNK 3: Fight of the Millennium 2015

King Lion is one of the characters from SNK side.

Sega vs. SNK: Black Sun

King Lion is part of the Starter Roster.

The King of Fighters XV (TheProjectXZoneFan1997)

King Lion is part of the Boss Team alongside Geese Howard, Mr.Big and Mars People

Tekken X SNK

King Lion appears as a DLC Character, his rival is Heihachi Mishima from Tekken.

Trivia

 * He was planned to be part of the Boss Team of The King of Fighters '96 alongside Geese Howard and Mr.Big but he was discarted and replaced by Wolfgang Krauser.