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github-actions[bot] edited this page Sep 21, 2026 · 5 revisions

mapchar

A cross-platform text viewer and editor for romhacking. It finds the text in a ROM, decodes it through table files, lets you edit it beside the original, and writes it back in place.

  • Getting Started: a first project, from opening a ROM to writing translated text back. It uses Mortal Kombat II for the Game Boy.
  • Relative Search: how to find text when you have no table yet, and how to build a table from a result.
  • Advanced Pointers: pointers inside code, one pointer that reaches several strings, and pointers into length-prefixed records. It uses the same ROM.

Home

Getting Started

  1. Project and ROM
  2. Build mk2.tbl
  3. Look for text
  4. A Strings block
  5. A Pointers block
  6. The translated table
  7. Redraw the font
  8. Translate
  9. Write the ROM

Relative Search

  1. Type a word
  2. The settings
  3. Read the results
  4. Build a table

Advanced Pointers

  1. Pointers inside code
  2. Several strings
  3. Pointers into records

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