Ganondorf
General
Ganondorf is an evil king that once conquered Hyrule. (The "world" Hyrule is in, in Digibutter's RP case, is RPOT.)
First Plot
Ganondorf conquered Hyrule (RPOT), but was defeated by a group of heroes. Supposedly killed, no one heard about him or his forces, until a dark lord arose, on another world...
Second Plot
Ganondorf was actually banished from his previous world, and not truly killed. He arrived on a new world (Miyamojo), and quickly took control of large portions of this new land. However, part of his power remained on the old world, taking the form of an evil Link clone.
Kotake and Koume were ordered to unleash the power of Ganon that this Link clone had, so they took a magical jewel left over from the creation of the world to awaken Ganon, so that there could be two evil kings, on two worlds. However, it was revealed that the awakened Ganon could not be controlled. Ganondorf decided to let this new Ganon rampage and destroy the old world.
Kotake and Koume went into hiding, but were eventually found and defeated. They banished themselves to another dimension to avoid death, and used the last of the magical jewel that they previously obtained to summon an avatar of Ganondorf to RPOT.