From there, the finalists will be brought to Wanganui on the eve of the HoopNation tournament in October.
These will be the top two from each region plus two wild cards the organisers like.
"Someone who had a wicked dunk on the uploads," said co-organiser KJ Allen.
In Wanganui they will be evaluated by a panel of judges, likely to be NBL luminaries, and the one chosen "King" will receive a trip to Kuala Lumpur to play on the Asian All Star team in a game against the NBA Legends, including Rodman.
To get involved, basketballers can upload their action videos from now until midnight on September 20, placing a hash tag (#) that they are entering the Northern or Southern region.
"We've given them four specific dunks they need to complete and a specific time for them to do it," said Allen.
In no more than two minutes, the high leapers must complete at least four styled dunks from "off the bounce","off the back board", "assisted", "prop" or "raw".
Allen said they will review the top eight most-viewed uploads from each region, so people needed to get in early to ensure everyone has had a chance to see them.
To find out more and to register, visit www.maifm.co.nz/ and go to Online Competitions.
The HoopNation tournament is being held at Springvale Stadium on Labour weekend, October 26-28.