Prehistoric Sonic Adventures of Sonic the Hedgehog : Season 1 Episode 40

The Badniks go back to the Mesozoic Era and steal the Emerald of Life, but not before Robotnik kills his Dumbniks to do so by throwing them into the volcano. Sonic is too late to stop him. Robotnik and his morons (who have somehow been resurrected despite getting thrown into the lava) go back to the last three episodes to get the other Emeralds, and Sonic and Tails are too late to stop them again. Robotnik places all four Emeralds on his neck and grows larger and becomes Surpreme High Robotnik, and sends Sonic and Tails to the Big Bang. They escape and rely on theirselves (other Sonics and Tails using the time-travel devices) to defeat Robotnik.