The official release of Dragon Ball GT: Transformation for the Game Boy Advance was only available in English. While the original game does not have an official Spanish translation, the community has created unofficial translations ("mods") to play the game in Spanish.
: Some sites offer pre-patched ROMs that have already been translated into Spanish by independent creators. Community Guides Descargar Dragon Ball Gt Transformation En Espanol Para
Código de ejemplo (pseudo código):
Let me be blunt: 99% of the websites offering this download are toxic. The official release of Dragon Ball GT: Transformation