If you are looking to play, Pokémon HeartGold is widely considered one of the best in the series: You can explore both Johto and Kanto.
The file was not a ROM. It was a self-extracting archive that dropped a cryptocurrency miner or a keylogger. The name "xenophobia" was used ironically to scare users into either avoiding the file (good) or clicking it out of curiosity (bad). 4780 - Pokemon Heartgold -u--xenophobia-
In the end, Kaito emerged victorious, and his message of unity and acceptance resonated throughout the Johto region. The people of Goldenrod City began to see Pokémon from other regions in a new light, and the city became a more welcoming place for trainers and their Pokémon from all over the world. If you are looking to play, Pokémon HeartGold