ds games had online? thought they only had local

i think some do, like for example mkds has online

you can but only some internets work, not modern 5ghz ones

yeah you can maybe not all of the games but some of them

You have to set your Wi-Fi router to use WEP security, as WPA/2 is not compatible with Nintendo Wi-Fi Connection. Please note that it is not recommended to use WEP security any longer than necessary due to critical security vulnerabilities.

Step 1: Open a DS game with online play Step 2: connectyour DS to a WiFi network that does not have a password (I use a hotspot on my phone) Step 3: Change the primary and secondary DNS to 178.62.43.212 Thats all you need to do and it works with most games!