Many ROM hacks modify trade evolutions (like Haunter to Gengar) to evolve via leveling up or using a "Link Cable" item found in-game. Check the hack's documentation.
To experience the classic Diamond and Pearl titles on your computer, you must use a DS emulator. pokemon diamond and pearl gba download for pc top
RetroMaster explained.
If you specifically want the GBA aesthetic, the fan community has created "demakes." These are unofficial modifications of older GBA games (like ) transformed to look and play like Diamond and Pearl. Pokémon Diamond/Pearl GBA (Fan Remakes): These typically use Pokémon FireRed Many ROM hacks modify trade evolutions (like Haunter
When downloading ROMs and emulators, be cautious of malware and viruses. Here are some safety precautions to take: pokemon diamond and pearl gba download for pc top