The CrashCape will do as it states: Crash people. If you join another person it will simply crash the host of the server. However if you use it while hosting it will crash everyone in your proximity except for you.

############

The ErrorCode cape is very similar to the CrashCape except for the fact that it sends out a Wii U Error Code to EVERYONE in the Server you're currently in. This is effectively crashes entire servers. The only downside is, you need to be within a reasonable distance for it to take effect. Otherwise? You can just crash entire servers with it.

############

The NetworkCape is similar to the CrashCape, except it doesn't crash anyone. It disconnects them from the Nintendo Network, which will cause their Server and their Wii U to go offline for a few minutes. It's faster and arguably more effective than crashing, while also not being as annoying to the recieving party. It follows the same rules as the CrashCape as well -- Join a server, it only affects the host. If you're hosting, it'll disconnect everyone.