"New Echidna in Town – Chaos Emerald Crisis (Part 3 of 3)" is the twenty-ninth episode of Sonic Underground. It aired on April 5, 1999.

PlotEdit

Knuckles the Echidna bargains with Doctor Robotnik in order to recover and repair the Chaos Emerald before Mobius is destroyed. However, to acquire the villain's help, the echidna must betray the Hedgehogs. After rescuing his friends from the Roboticizer, Knuckles and the Sonic Underground must now combat Dingo, who has been transformed by the chaos energy into a terrifying monster. Dingo is too strong for Sonic, Sonia, Manic and Knuckles, so they wait until the Chaos Emerald's energy drains out of Dingo and he is soon into normal form.