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EarthBound Title (animated).gif
Company Nintendo
Header SWC
Bank HiROM
Interleaved No
SRAM 64 Kb
Type Normal + Batt
ROM 24 Mb
Country USA
Video NTSC
ROM Speed 120ns (FastROM)
Revision 1.0
Checksum Good 0x4048
CRC32 DC9BB451
ROM map | RAM map | Text table | Notes | Tutorials


  • The main place for discussion of EarthBound hacking is's PK Hack forum.
  • There is also a Slack chatroom you can join, which people use as a spiritual successor to the old #pkhax IRC chat from the early 2000s.


  • CoilSnake, written in Python, is the principal EarthBound hacking utility.
  • JHack, also known as PK Hack, was an old utility that was abandoned by the community after CoilSnake came out.



  • Two debug menus are accessible. The boot-up debug menu uses a Kirby sprite as its cursor.
  • For a list of unused graphics and dialogue, check out The Cutting Room Floor.
  • Check out Tomato's Legends of Localization book if you're interested in the various changes made to the game during the localization process.
  • Odds and Ends - a list of discoveries and techniques

Known Dumps

  • EarthBound (U) [!]
  • EarthBound (U) [f1]
  • EarthBound (U) [f1+C]
  • EarthBound (U) [f2]
  • EarthBound (U) [f3]
  • EarthBound (U) [t1]
  • EarthBound (U) [T+Spa091b_Tanero]
  • Mother 2 (J)
  • Mother 2 (J) [b1]
  • Mother 2 (J) [b1+C]
  • Mother 2 (J) [b2]
  • Mother 2 (J) [f1]
  • Mother 2 (J) [f1+C]