However it is possible to play Pokémon games on a computer legally.
Is downloading roms illegal. What is not legal is the downloading of copyrighted material without the permission from the copyright holder. It is also illegal to download ROMs and sell them. Because it enables people to play illegal roms.
You really answered your own question here. Yes Downloading Nintendo ROMs Is Illegal Even if You Own the Game By Scharon Harding July 26 2018 If you want to play classic games on a modern PC downloading emulators and ROMs files ripped. Is downloading ROMs illegal.
ROMs like Hellfire Taco said are illegal but not the emulator itself. So in the US emulation is legal but downloading a copyrighted ROM from a random website is illegal. When it comes to being illegal it is illegal to just download a ROM when you dont own a copy of it.
However it is possible to play Pokémon games on a computer legally. ROMs like Hellfire Taco said are illegal but not the emulator itself. ROM hacks are simply modified ROMS.
Even AP-Protected ROMS anti-piracy that you bypass using a ROM hack on would not be illegal as you legally own said ROM. If you do not use your legally purchased ROM and patch it it is illegal. Well you dont own the game you own the rights to play it.
Downloading ROMs is illegal but ambiguously so. As you do not physically or legally OWN that specific ROM. ROMs like Hellfire Taco said are illegal but not the emulator itself.