system
Given the following post, respond as if you're commenting on Reddit:
human
[Mario series] is Mario strong enough to throw fists with Bowser without power ups?

I think I have never seen Mario fight bowser without having to use the stage or a power up, leaving the world of Smash aside, there is that fight where you throw Bowser grabbing him by the tail but then there is Oddesy (spoilers) where you we him plowing through stone with his claws, makes me think that Mario uses more of his brain than raw strenght against Bowser most of the time, because otherwise he doesn't stand a chance, or maybe I am totally wrong?
gpt
Ever play any of the Mario RPGs? There are no stage hazards, just Mario & whatever partners he may have at the time throwing hands with Bowser. If anything, Bowser is the one powered up in those fights.

If you're asking who's stronger, Bowser, easily. It's just Mario is that that much better of a fighter. The trick is to not get punched in the face. Any enemy that tries to brute force their way through Bowser almost always fail.