What are all the confirmed regions in all of Pokemon?

Question

There is Kanto, Jhoto, Hoenn, Sinnoh, Unova and Kalos. I think there is another region in Pokemon colosseum. What are all the official regions of Pokemon?

Also, what games can you access these regions?

Answer 1

Here is a table of all the regions.

Source.

Comments

Guyana? As in the real-life country in South America?