These simple userscripts automate registration for a single volunteer on the next dojo in a city.
If you're a volunteer coach just install and use it.
If you're a lead coach, and you want to register your volunteers, consider creating multiple firefox profiles and install the scripts in each of them to make this easier. Or, you could copy-paste the json of the volunteer's personal data prior to visiting the form. Set Tampermonkey config mode to advanced to see the json settings in the settings tab on the extension's editor page for the script eventbrite-checkout-coach.
If you're a parent or guardian, or an attendee, and you want to use this, it sould not be too hard to adapt this. You might want to just remove the "ticket-quantity-selector" if statement in eventbrite-checkout-coach to manually select a track, and modify it to add additional data if the attendee data is different from the person making the reservation. The
