The following are known Game Genie Codes for Best of the Best Championship Karate on Nintendo Entertainment System (NES).

• Each Round Is 0:10 Instead Of 1:00
  AANIGYPA
  VTNIPYSA
• Each Round Is 0:20
  AANIGYPA
  OZVSYYSE
  ZANIANTI
• Each Round Is 0:30
  AANIGYPA
  OZVSYYSE
  LANIANTI
• Each Round Is 0:40
  AANIGYPA
  OZVSYYSE
  GANIANTI
• Each Round Is 0:50
  AANIGYPA
  OZVSYYSE
  IANIANTI
• Each Round Is 2:00
  ZANIGYPA
• Each Round Is 3:00
  LANIGYPA
• Each Round Is 4:00
  GANIGYPA
• Each Round Is 5:00
  IANIGYPA
• Each Round Is 6:00
  TANIGYPA
• Each Round Is 7:00
  YANIGYPA
• Each Round Is 8:00
  AANIGYPE
• Each Round Is 9:00
  PANIGYPE
• Each Match Is 1 Round Instead Of 5
  PAOSUZIA
• Each Match Is 2 Rounds
  ZAOSUZIA
• Each Match Is 3 Rounds
  LAOSUZIA
• Each Match Is 4 Rounds
  GAOSUZIA
• Each Match Is 6 Rounds
  TAOSUZIA
• Infinite Time (Round Never Ends)
  SXVSAZVG
• Start With 50 Resistance Points
  ZLEAZETP
• Start With 50 Strength Points
  ZLEAPEAZ
• Start With 50 Reflex Points
  ZLEALAGP
• Start With 70 Resistance Points
  TGEAZETP
• Start With 70 Strength Points
  TGEAPEAZ
• Start With 70 Reflex Points
  TGEALAGP
• Gain More Strength And Reflex Points In Training
  AAEVVAGE
  AEETOPZA
• Gain More Resistance Points In Training
  APEVVAGA
  AEETOPZA
• All Physical Types Are 30
  OXNSGIOU
  TONSIIZE
• All Physical Types Are 50
  OXNSGIOU
  ZUNSIIZA