Something wrong with Pokemon Pearl

I was playing it for awhile then i turn off my ds. Awhile later i turn my ds and when i click on pearl it was a DS icon instead of pearl icon (pink pokeball i think). It said Pokemon Pearl as the game on top and i cant read what is next to the ds icon cause it is in chinese. When i try to start the game it won't work and loads to a white screen then nothing happens or changes. I try to overwrite my pearl version but when i do i press yes it said the ile is corrupted and gives me 0 kb file instead. I have try to re download from the site and put it on my R4 but nohing works? Help?

Sounds like something got messed up, backup your save games and format your SD card.