Sonic Underground

The siblings rush to rescue a friend and the Oracle, and finally learn to work together.

Knuckles makes a deal with Robotnik to save Mobius, and Dingo swallows the Chaos Emerald.

The newly reunited siblings begin their training with the Oracle’s teachers.

The broken Chaos Emerald unleashes disasters, and Knuckles’ great-grandfather says Robotnik is the only answer.

Queen Aleena tells how Robotnik took power and why she gave her triplets away.

Robotnik’s Flying Fortress is powered by a Chaos Emerald, and Sonic needs Knuckles to stop it.

In a mirror world, Robotnik leads the rebels and the hedgehog royals are greedy tyrants.

A masked prisoner who claims to be the triplets’ uncle turns them against each other.

A book about the royal dynasty leads the siblings to a desert temple, where an ancient mummy wants a song.

Recruiting desert nomads for the Resistance, Manic discovers that their chief is hiding a dangerous secret.