About ROM translation

Requires Windows.

• To edit graphics tiles: Tile Layer Pro from https://www.zophar.net/utilities/graphutil/tile-layer-pro.html
• To search for strings in Japanese, use Monkey Moore from https://gbatemp.net/download/monkey-moore.29133/
• To edit hex values, use Hex Workshop from http://www.hexworkshop.com/overview.html

The best tutorial out there as of 2024

High-level steps

• Play the game to find a piece of Japanese text you want to translate
• In Monkey Moore, select Advanced -> Define character set and click on the button to load the "default Hiragana" or "default Katakana" sequence
• Search for the Japanese text, for example, フレイ
• In the Results section, note the Offset of the text, e.g. 3DE61. This is the value you will put into Hex Workshop's Go To command to find the place in the program where you need to replace hex values.
• Click Create Table and save the table file.
• In Tile Layer Pro, replace the Hiragana characters with English alphabet characters
• https://www.zophar.net/utilities/hexutil/thingy32.html