Walmart prosecuting me , have court soon , plea guilty or innocent??

I was at Walmart with my friend & she started stealing things & putting them in her bag. I would pick up something & be like thats cute & she would think it was too & steal it. We went to leave & someone stopped us . She told the police & my mother I didnt steal a thing & nothing was found on me . In the end I went to juvi because I was older & I now have court , she already went to court & they gave her fines & 3 weeks of probabtion. Should I plea guilty or no?