Most Pokémon ROM hacks are broken or full of glitches. The wwwmaxromscom exclusive upload of Pokémon Prism is the final, post-C&D (Cease and Desist) build, featuring the complete Rainbow Dev room and a working Pokedex that other versions lack.
A proof-of-concept ROM that shows the fisheye-lens engine. Standard dumps of this are corrupted. The wwwmaxromscom exclusive version is byte-perfect and runs on Mednafen without crashes. wwwmaxromscom exclusive
This is where the keyword shines. The wwwmaxromscom exclusive PS2 library offers "Undubbed" versions of games like Persona 4 and Yakuza 2. These are North American ISOs modified to include the original Japanese voice tracks while retaining the English subtitles. Most Pokémon ROM hacks are broken or full of glitches