Yes Precure 5 Go Go doesn't work.

I extracted the files to my r4 and it loads well, but when the game loads it just leaves on
a standby. Any ideas ? I think I may have to convert it to work but how do I do that ?

No you don't have to convert. Try backing up all your data and reformat your MicroSD. And then update your firmware if you haven't at http://www.linfoxdomain.com/ds/.