I need a Nincada for my team like you saw from my team suggestion question i need one... I set my dsi xl day to SATURDAY but it still doesnt work its 9:55 on my dsbut in real life its 11 LOL...
If you set your DS on a wednesday for example there would be no bug catching contest on that day. So changing it to Saturday would make no difference. You would just have to wait for the next one.
The bug catching competitions are on Saturday, Tuesday and Thursday.
I believe there is a way to change the date and time. The code was only distributed in japan. Heres the link. https://www.pokewiki.de/Spezial:Geheimcode-Generator#pwaikotoba (in german but easy to figure out)
You need the language of the game, the game you are playing, trainer id, and if your playing gsc money and your trainer name, case sensitive.