Cartoon Girls Boxing Database

Hungarian Comic strip involving the titular character getting punched by her sleeping lover, only to have her retaliate with boxing gloves.

Doc Justice has Nico Minoru learn hand-to-hand combat.

Sasha Bordeaux does some boxing training in the Batcave for a number of pages.

https://www.crunchyroll.com/classicaloid/episode-10-liszt-vs-risuto-bell-gong-of-destiny-780321 Liszt has a music recital number with a boxing theme.