PMD: RAD (web.archive.org mirror) is a discontinued PMD comic by MatchaGhost (previously PhantomCat)
MatchaGhost initially stopped working on Idano, another comic, before working on PMD: RAD on June 2nd, 2013 "[to] be good practice, something to prepare me to make the Idano I really wanted"
On September 1, 2018, the comic continued until Chapter 5, but was discontinued because of MatchaGhost’s lack of being able to get into the marketing aspect of PMD: RAD, the "constant nagging insecurity in the back of my mind that people only read it because it's Pokemon", and "my energy is better spent on comics that I own completely", among other reasons.

As a conclusion for those curious on where the direction of the story would have gone, MatchaGhost has answered it here

Working on their new comic, MatchaGhost has completely shifted their focus to Alsioh Devosa (comicfury mirror) in the world of Thaelys, and will not continue to answer asks about PMD: RAD. If you wish to support MatchaGhost's future endeavours, consider checking the comic out for yourself!

Editor’s note: Here is the comment section for the very last goodbye page (page 183) on google docs

Unchaptered
Chapter 1: Tasks and Meetings
Chapter 2: The Weird Guy From the Valley
Chapter 3: Testing Day
Chapter 4: Mystifying Forest
Chapter 5: Learning the Ropes