Pachacamac

Pachacamac (パチャカマ), or Chief Pachacamac, was a reddish-brown echidna with yellow stripes and blue eyes. He lived roughly four thousand years before the main events of the Sonic continuity, as a leader and warlord of the Knuckles Clan (the echidna civilization of which Knuckles himself is the last descendant). Tikal the Echidna is his daughter. He is named after an Inca city located 40 km SE of Lima, Peru.

In Sonic Adventure, his first appearance and only speaking role in the games, Pachacamac is shown with a furry muzzle (unlike other echidnas, possibly due to his advanced age) and he exhibits a constant squint; although this quirk was absent from his Sonic X portrayal.

Being long-dead, Pachacamac has only ever been seen in flashbacks: during Sonic Adventure thanks to Tikal (in her incorporeal form as a glowing ball), and in Sonic Chronicles: The Dark Brotherhood, when Imperator Ix briefly recalls the face of his ancient foe.

History
During the flashback scenes in Sonic Adventure, when the characters are briefly shown the Mystic Ruins Knuckles Clan city during Pachacamac's time around 4000 years ago, talking to the various echidna citizens reveals some details about the clan chief. He is said to have inherited his chieftain rank from his mother, a peaceful woman whom Tikal takes after. Although Pachacamac initially loved his daughter, he lost all compassion when his wife died, becoming a cold and distant father; as well as a greedy warmonger, directing his people into a series of conquests against neighboring nations and tribes (including another group of Echidnas known as the Nocturnus Clan, as Sonic Chronicles later reveals). Tikal did try to talk her father out of his belligerent ways, but ultimately failed.

Later, along with a group of Echidna warriors, he tried to take the Chaos Emeralds and Master Emerald from the Chao, as he considered the power of the Emeralds key to the Knuckles Clan's continued victories and survival. Tikal tried to defend the shrine and the Chao living there, but Pachacamac ignored her pleas and ordered the warriors to go on. Tikal is pushed aside and the Chao of the shrine were knocked out in the process. This angered their guardian Chaos who appeared and used the Chaos Emeralds to become Perfect Chaos. Pachacamac and his warriors were killed and the Echidna city was almost entirely destroyed. This caused his daughter Tikal to rush to the Master Emerald to plead that it get Chaos under control, resulting in both of them being sealed away for thousands of years.

Archie Comics
Pachacamac appeared in the Sonic the Hedgehog comic book series and spin-offs. In this media, Pachacamac was the leader of a warrior caste from Albion, who fought in a territorial war with the Felidae and the Nocturnus Clan during a colonization by the echidnas. Then the war was going against the Knuckles Clan, Pachacamac sought to harness the power of seven local Chaos Emeralds to win the war, but ended up incurring the wrath of Chaos and was subsequently killed by the creature.

Sonic the Comic
In Sonic the Comic, Pachacamac went under the name "Pochacamac". In this media, Pochacamac was the ancient spiritual leader of the Ancient Echidnas who his people against the Drakon Empire in a war to keep them from using the Chaos Emeralds to conquer the galaxy. Eventually, Pochacamac had a vision of Sonic the Hedgehog who would become the Drakon's sworn enemy in the future, so he and Tikal brought Sonic to their time to help them against the Drakons. However, when Chaos was mutated into a water monster and nearly killed Sonic, Pochacamac was forced to send Sonic back to his own time to save his life.

Sonic X
Pachacamac also appeared in Sonic X as a part of the televisions series' adaption of Sonic Adventure. Much like in Sonic Adventure, Pachacamac was an ancient warmongering chief of a tribe of echidnas and sought the Chaos Emeralds to seize power. Despite her daughter Tikal's attempts to change his mind Pachacamac attacked the Emeralds shrine with his men, only to incur the anger of Sonic and later be killed when the creature transformed into Perfect Chaos.

Trivia

 * Pachacamac's name is derived from that of a real-life Incan city-temple.
 * Because this character came from the past (and died there), he is never seen after Sonic Adventure, except in Sonic Chronicles where he is in a brief flashback and mentioned quite a few times by Knuckles.
 * Pachacamac is very briefly referenced in Sonic Unleashed; in one Werehog level of Empire City, a neon building sign reads "Pachacamac Parking."
 * Aside from Tikal, Pachacamac is the only main echidna that does not have purple shaded eyes.
 * In Sonic Chronicles, Shade once referred to Knuckles as "Pachacamac's descendant", meaning that Knuckles could be related to Pachacamac as well as Tikal.