Dingoes

Dingoes were the second main population on Angel Island, after the Echidnas. They are a militant race, generally feeling outright racism and xenophobia towards the Echidnas. Under the rule of General Von Stryker the Dingoes managed to barely coexist with their Echidna neighbours, though eventually revolting. Under the recent rule of his son, Kage Von Stryker, the Dingoes alligned with the Eggman Empire. After performing mass genocide against the Echidnas, reducing their population to 10% of their former size, the Dingo Regime was obliterated by the new Enerjak, its survivors banished to the Sandopolis Zone of Angel Island.

Conflict with the Echidnas
Centuries ago, the Dingoes attempted to wipe out the Echidnas and their city of Echidnaopolis by using nuclear warheads provided to them by Overlanders. Although the missiles were successfully launched, the current Guardian at the time, Hawking, brought up a dome shield over the city, which destroyed the warheads. Unfortunately, the mass radiation from the weapons began to spread across Angel Island. To ensure the population of the Floating Island was safe from the radioactive waste, Hawking transported Echidnaopolis and its population to one zone, and the Dingoes to another, along with their city. (KtE: #5)

The Dingoes remained in their zone as the Echidnas did in theirs for hundreds of years, while Hawking cleaned up the Island, until Dr. Ivo Robotnik fired the Ultimate Annihilator, which distorted the zones and caused both the Echidnas and Dingoes to be transported back into the prime zone. The results of the Ultimate Annihilator on the zones proved to be more beneficial to the Echidnas, restoring their city of Echidnaopolis to the prime zone, while leaving the Dingoes' city in their former zone. (StH: #50, KtE: #5)

Temporary Alliance and Revolt
When Dimitri the Echidna returned to Mobius as Enerjak and began his invasion of Echidnaopolis, the Dingoes, lead by General Von Stryker, assisted the Echidna Security Team's defence of the city against him and the Dark Legion. Their efforts against the nearly omnipotent being proved useless, although Enerjak was quickly defeated by Mammoth Mogul who stole his Chaos powers for himself. However, he too was quickly defeated, by the trio Super Sonic, Turbo Tails and Hyper Knuckles. (StH: #56. KtE: #7, #8, #9)

The Dingoes, now forced to live in Echidnaopolis with the Echidnas, felt they were being treated like second-class citizens. The Echidna Council attempted to aid the Dingoes by constructing shelters and housing for them, but the process was far too slow for the Dingoes, who decided to protest against the Council. During their protest however, the entire city was transported to the Twilight Zone when the Dark Legion fired their Quantum Beam. The effects were later reversed by Chaos Knuckles, bringing the Dingoes and the Echidnas back to Echidnaopolis. (StH: #107, SSS: #14)

Servants of Eggman
After the fight against the Xorda, when Sonic the Hedgehog disappeared and was presumed to have perished, Dr. Eggman offered the Dingoes a deal they couldn't refuse. In exchange for technological support and aid from the Eggman Empire, the Dingoes would act as Eggman's enforcers on Angel Island. After ousting his father as leader of the Dingoes, Kage Von Stryker accepted the deal. With their new-found resources and technology, coupled with the disappearance of the entire Brotherhood of Guardians (except for Knuckles and Locke), the Dingoes were able to overpower the Echidnas and install a fascist regime, oppressing the Echidnas and forcing them into slavery and concentration camps. (StH: #138, #181)

With the assistance of the recently-returned Sonic, Knuckles, the Chaotix and the Dark Legion successfully liberated one of the concentration camps, as well as freed Locke from Dingo captivity. Additionally, the safety of the Master Emerald remained intact, and its location moved. However, the Dingos remained a threat for some time, and with the Dark Legion eventually caught up in its own civil war, they were able to repeatedly attack the remaining Echidna population (now only 10% of its former size) and reduce the recently-restored Echidnaopolis to a primitive collection of huts and houses, open to attack. (StH: #139, #140, #141, #171)

Banishment
Initially, the Destructix at Dr. Finitevus' command beat back repeated Dingo incursions, they eventually began planning a massive attack to overwhelm the Destructix and wipe out the few remaining Echidnas. Fortunatly, this plan never reached fruition, as Finitevus was successful in creating a new Enerjak (from Knuckles), and direct him to attack the assembled Dingo population at their city of Cavem Canus (the former site of Echidnaopolis). Enerjak promptly stripped the Dingos of their weapons, technology, and their pride, and condemned them to wander the desert region of Sandopolis and killed the Dingo leader; Kage Von Stryker, in a brutal manner. This brought the Dingo Regime's hold on Angel Island to a crashing end forever. (StH: #171, #180, #181)