Starting with the PlayStation version of Tekken 1, Armor King's version of the Knee Bash was slightly modified, making the opponent roll over after being slammed, instead of bouncing back on impact. This move should not be confused with the jumping Knee Bash (f,f+4) move used by Yoshimitsu and Kunimitsu, or the Knee Drive (f,f+3+4) throw performed by Marshall and Forest Law, and Lee Chaolan.
With King, the input was originally 1+3 in Tekken 1 and 2, but as of Tekken 3, the input changed to d/f+2+3. The escape input is 1+3 in Tekken 2, and 1 in Tekken 3 and later games. Armor King's input remains 1+3 throughout the series and shares the same throw escapes as King.