Digimon

Digimon are "digital monsters", and are digital life forms.

They were created by the Monster Makers, though they never got to complete their project, it was continued by one of them, Shibumi, who finished creating them with an algorithm in the form of a blue card. Digimon appeared in the digital world, but many were killed by the D-Reaper until it disappeared. After this, Digimon were able to digivolve with the light of digivolution, creating more layers of the digital world. The four most powerful Digimon, ruling the digital world, were the Sovereign: Azulongmon, Zhuqiaomon, Ebonwumon, and Baihumon.

While not physically built as male or female, they are still identified as such.

Digimon mainly knew fighting. Some fought for good, some fought for data, some fought for evil. When a Digimon destroys another Digimon, they will usually absorb their data, which is their last physical remnants and contains their power, thus increasing the victor's power. The only Digimon whose data is absorbed by a different Digimon than the one who destroyed him is Caturamon. If a Digimon's data is not absorbed, then it is discarded, and will either go to the Forgotten Village or else be reformatted as a new Digimon, though the dead Digimon will always remain dead.

Unlike in the first two seasons, Digimon cannot come back to life. The only exception, for reasons unknown, is Vajramon. However, Leomon's spirit returns, similar to how Wizardmon, Devimon, and Myotismon returned as ghosts in the first two seasons.

Although they are made of data, they are living creatures.

Eventually Digimon began coming to Earth, some receiving humans as tamers, others out to attack Earth. Renamon became Rika's partner, Terriermon became Henry's partner, and Takato created a Digimon, Guilmon. Evil Digimon known as "Wild Ones" would often bio-emerge and attack Earth. A digital field, resembling fog, enabled bio-emergence on Earth, and after a while the Digimon could leave the digital field. The tamers' Digimon would often destroy the Wild Ones before they could do much damage, though Rika and Renamon initially only did this for their data.

Eventually the Devas, created by Zhuqiaomon  began arriving on Earth, as Zhuqiaomon thought humans to be a threat to the digital world, much like Yamaki, who wanted to destroy all Digimon, thought Digimon to be a threat to Earth. Eventually, both Yamaki and Zhuqiaomon turned aside from their quest to destroy the other, and helped the tamers fight the D-Reaper. During the final battles, tamers and their Digimon biomerged together into Mega forms.

The levels of Digimon are, from weakest to strongest:
 * In Taining
 * Rookie
 * Champion
 * Ultimate
 * Mega