Tails and Amy infiltrate G.U.N.'s island base and rescue Sonic, while Eggman, Shadow and Rouge collect three Emeralds on the island. Eggman makes a global broadcast threatening to fire on the Earth in 24 hours if his demands are not met, demonstrating the cannon's power by using it to destroy half the Moon. Sonic, Tails, Amy, and Knuckles use a Chaos Emerald in their possession to track down the other six. They infiltrate Eggman's base, boarding his shuttle shortly before it launches into space. Knuckles' Master Emerald shards are spilled along the way, and he leaves to collect them. He fights Rouge again, but when he saves her from falling into a lava pit, she relinquishes her shards and he restores the Master Emerald.