|Sonic and Tails against the Big Icedus|
|Features in||Sonic the Hedgehog 3|
Sonic 3 & Knuckles
|Level||Ice Cap Zone|
|Previous Boss||Graviton Mobile - Sonic and Tails only|
Bowling Spin - Knuckles only
|Next Boss||Freezer Mobile|
Big Icedus is the ninth boss in Sonic the Hedgehog 3 and Sonic 3 & Knuckles when playing as Sonic and Tails, and is the eighth when playing as Knuckles. The boss is found at the end of Act 1 in the Ice Cap Zone and is found outside of the large ice cave when playing as Sonic and Tails, or inside the cave when playing as Knuckles. Regardless of the location his movements and attacks are the same.