The Earthbound series (known as the Mother series in Japan) is a collection of three turn-based RPG's. The first one was released in 1989 on the NES in Japan, however it was not until Earthbound (Mother 2) that any of them would see a Western release. Unfortunately, Earthbound flopped, and as such is the only one to have been released in the West.
Power of the Verse
The verse is quite powerful, with the strongest character being the Player. It also contains the universe destroying Giygas. Then there is also several planetary threats. Overall, it is one of the most powerful Nintendo franchises.