Magnemite could be a problem.
No national Pokdex, hollow story – what will the Pokmon Sword and Shield do wrong next? You will stop yourself from being able to stream from a Roku device apparently because games are said to cause the device to crash.
Yesterday, a Pokmon Sword and Shield player was taken to a Pokmon subreddit reporting on the game's function to find other switches playing Pokmon were picked up by Rokus (thanks, Nintendo Life). Supposedly the signal the Switch sends when a player searches for other coaches in a game is similar to the data that Rokus uses to function.
The main Roku device appears to be the Roku Stick HD, although players have reported that other devices are behaving as well.
Roku has now confirmed the problem and issued a statement saying it is working to correct:
"We are aware of a problem when using Nintendo Switch and the latest Pokmon games affect a limited number of Roku devices. We are working diligently to resolve this issue. In the meantime, turning off the Nintendo Switch or switching to Airplane mode should resolve the issue."
One theory, reported by CNET, suggests that games are "flooding the network with UDP packets in an attempt to find local players for Y-COMM", namely the new Internet trading link and Link Battles. Until the company figures things out, your best bet is to play your games in airplane mode so that Roku doesn't get confused.