Hey Allan,
Thanks for reaching out to us. I’ll address your questions in order here:
I’m interested in a solution that also includes a registration form. Is that available?
If I understand your question correctly, then unfortunately no, our core plugin does not include a registration form. Neither does PRO. However, WordPress itself does have the capability of letting users register for the site, and we also have another add-on called “Community Events” that lets users submit events from the front-end and stuff, if that’s useful for you. [You can learn more about this add-on here → https://theeventscalendar.com/product/wordpress-community-events/%5D
As for your second question, “Do you have partnerships with any themes to allow for purchase of a complete bundle?”, at this time we do not.
Thanks,
George