Do you have any seeds in your town?
**other than bricks**
Fiddle with the
DS Clock.
Its probably a game malfunction
they probably put something in your town your Game Cartridge and/or
DS System is not familiar with causing it to break down.
The
DS Clock usually fixes the problem especially dates in the year 2099
Your game should be fine when its finally able to boot. No erased data.
But if the brick was permenent you may need to buy an Action Replay.
Meaning the
DS Clock just wont work.
I hope i helped im sorry about that dude.