Trying to beat Fresh Start challenge, who are my best options here?

I want to complete the challenge with Pokemon that don’t have ribbons yet, these are the starters I have left. Haven’t managed to get past the first evil team admin fight on 66 yet, would greatly appreciate some tips and pointers!

I will say, I’m trying to save Scorbunny for my last ever Classic run since Cinderace is my least favorite Pokemon, truly can’t stand that thing. I’d be willing to run through Fresh Start with every other starter and fail five times in a row before admitting success with Cinderace.