Three people worked on this for about a month. It is completely playable on a Pixelmon server along with Johto, Hoenn, and soon Sinnoh. The entire server is supposed to play as a complete Pokemon game, creatively combining all of the regions.
Are you gonna add every single region? Like Johto, Hoenn, Sinnoh, Unova, Kalos...
Yes, we do plan on adding every region. Hoenn is being worked on by another player on a private server and will be complete soon, then work on Sinnoh will begin. After that it's likely Unove and Kalos will be added.