The latest Pokemon games have launched some Roku systems for a loop, but fortunately, there is a solution. If you encounter a problem where someone playing Pokémon Sword or Shield on your Wi-Fi network is blocking your Roku decoder or your Roku TV, there is a fix.
First, you need to put your Nintendo switch in airplane mode or turn it off. From there, the Roku device should stop being damaged, and you will be able to access the settings and update them. The “System Update” setting is located under the subtitle “System” in the device settings. One of the theories that explain why this problem arises is this: When you play on the new Pokemon, it is constantly looking for other Switch devices to connect to.
Roku devices do something similar to send updates locally. Therefore, when both systems used the same network spectrum to transmit signals, they were disturbed by Roku devices.