(Sorry, my English is not very good)
I think I should have Cinderace learn a Sp. Atk and I think these two are pretty good to use My libero Cinderace: - Pyro Ball - High Jump Kick - Sucker Punch - Flamethrower/ Swift So what do you guys think? Or is there a Sp. Atk move that is better and more suitable than the above two
Cinderace's Sp.Atk is a meager 65, so Special attacks are really not worth it. You should also avoid type overlap to give yourself more coverage.
I would recommend Gunk Shot for the fourth move slot as it is a strong Physical attack that is commonly used on Cinderace. U-Turn is also often seen to pivot out and make effective strategies. Other good moves for it may include Bounce, Zen Headbutt or Iron Head.