Bowser solos all of the Wario-adjacent characters very easily.

Very few characters in the Mario franchise could actually beat Bowser in a direct battle. Even Mario himself is only able to defeat Bowser due to his ability to use powerups, and even then it's usually due to outside circumstances such as using Boswer's weapons against him, I don't see any way that Lulu could take Bowser in a 1v1 fight.

Bowser can easily defeat anyone because he has numerous powers and abilities to become powerful in order to reclaim his victory.