I think Palpitoad's probably has more experience in battling. It's been guarding that lake for who knows how long, debuted with a pretty strong moveset, and it won a few more battles for Ash. On the other hand, Palpitoad lost to Oshawott, who lost to Boldore (as a Roggenrola), though, Roggenrola used the area around it to make Oshawott KO itself.
So I'd say Palpitoad is stronger in terms of brute force and power, but Boldore is craftier and would be harder to beat without Ash's guidance.
sees two options that shouldn't be there.
I have claimed the Spell Tag and Kasib Berry, along with Adaptability and Shadow Ball. I have also claimed Gastly.
If you think Nintendo need to sue PETA up the ass for making Pokemon Black and Blue, copy and paste this into your sig.
Obviously Palpitoad would win in a head on battle because of the type advantage, but even in a test of strenth I would think Palpitoad is stronger