A Pokémon Ntevo ROM is a modified version (ROM hack) of an official Pokémon game where these trading restrictions are completely removed. Every single Pokémon that originally required a trade to evolve is reprogrammed to evolve through standard, single-player gameplay methods. How Do Pokémon Evolve in Ntevo ROMs?
: They are widely used by the retro gaming community on handheld devices like the Steam Deck to enjoy the "full" experience of older generations without original hardware. Community Alternatives Pokemon Ntevo Roms