DS Error Code 54000

This error is caused by an issue with the access point your Nintendo DS is trying to connect to. A connection cannot be established.

To solve this error :

Your Nintendo DS may be out of the wireless range. Move as close as you can do the wireless router and face at it if possible.

Wireless interference can also be a problem. Disable any nearby wireless phones or speakers.

If you are connecting to a hotspot, make sure you have access to the hotspot as some require you to set up an account first or pay for access.