So a little context might be required.

If you check out official Sonic the Hedgehog profiles, they have in the past cited Dr. Robotnik as being a feminist (specifically, I believe you could find this stipulation in the insert for one of the games where it read: "Eggman is a romanticist, a feminist and a self-professed gentleman"). In the past the possibility that this was actually a mistranslation of "womanizer" was brought up.
For me.... Honestly, I just think it's kind of hilarious.
Whether Robotnik is actually, canonically a feminist, or whether it was a bad translation, overall the outcome is funny and interesting, although for completely different reasons.
Came up with this idea for Robotnik to be wearing one of those "Ask Me About My Feminist Agenda" shirts (specifically the one worn by Mockingbird on that one Civil War II cover) and I couldn't get it out of my head. And so, from the bowels of a drunk livestream, I present to you.... openly feminist Robotnik, I guess.
With socks and sandals just because.