The following are known Game Genie Codes for Monster Party on Nintendo Entertainment System (NES).

• Take No Damage, Except From Guardians
  SXXAYYVG
• Take No Damage From Guardians
  VVXAIYVG
• Start On Level 2
  PAKOZIAA
• Start On Level 3
  ZAKOZIAA
• Start On Level 4
  LAKOZIAA
• Start On Level 5
  GAKOZIAA
• Start On Level 6
  IAKOZIAA
• Start On Level 7
  TAKOZIAA
• Start With Boosted Energy
  APUPZSGE
  AOKPTKGE
• Start With Super-Boosted Energy
  GZUPZSGE
  GXKPTKGE
• Cool Flashing Color, Black And White Title Screen
  PANPAI
• Cool Scramble Of Blocks, Trees And Spikes, Must Go Backwards
  KEPITV
• Level 8 Warp
  YAKOZIAA