A newly developed subaquatic Seal type robot. Its breath can freeze the water around them in an instant, creating obstacles when Sonic needs to look for air bubbles.
Website Sonic The Hedgehog 4: Episode II
Robot (based on a sea lion)
Purple and yellow
Steelion (, is a ドドン Dodon ) ? Badnik which resembles a purple sea lion. It appears only in White Park Zone from .
Sonic the Hedgehog 4: Episode II
Steelion attacks by emitting a freezing pulse from its mouth, freezing a small area in front of itself. The main purpose of this attack is to create an obstacle for the player, cutting off shortcuts or preventing the player from reaching a safer area. If the player is in the vicinity of the pulse when it's performed, it will cause damage to the player.
Steelions tend to perform their attack as soon as the player approaches, making them hard to defeat.
Steelion in the White Park Zone.
Sonic | Tails | Animals ( Flicky, Pocky, Pecky, Cucky, Picky) | Dr. Eggman | Metal Sonic
Asteron | Balkiry | Batbot | Bubbles | Burrobot | Buzzer | Chop Chop | Chopper | Clucker | Crawl | Flamer | Fullboar | Jaws | Mantis | Moto Bug | Newtron | Orbinaut ( Uni Uni, Unidasu) | Sandworm | Scarabesque | Shellcracker | Slicer | Snowy | Spikes | Steelion | Turtloids | Zoomer
Episode II Zones Sylvania Castle Zone | White Park Zone | Oil Desert Zone | Sky Fortress Zone | Death Egg mk.II Zone | Special Stages
Episode Metal Acts
Episode Metal Act 1 | Episode Metal Act 2 | Episode Metal Act 3 | Episode Metal Act 4
Egg Serpentleaf | Metal Sonic | Egg Scrap Mech | Metal Carrier | Metal Sonic and Egg Mobile | Metal Sonic | Egg Heart
Copter Combo | Propeller Flying | Homing Attack | Rolling Combo | Spin Attack | Spin Dash | Spin Jump | Submarine Combo | Tornado Boost
Air Bubble | Bumper | Capsule | Booster | Chaos Emerald | Flipper | Giant Ring | Item Box ( Super Ring, Shield, Power Sneakers, Invincible, Extra Life, Special Combination, Combination Dash) | Ring | Spring | Star Post | Red Star Ring | Spikes | Switch | Signpost
Conveyor Belt | Crusher | Death Egg mk.II | Fan | Flip Platform | Little Planet | Level Select | Lost Labyrinth treasure | Platform-raising Wheel | Original Soundtrack ( & Episode I) | Strange Relief | Ring Shooter | Stardust Speedway | Shuttle loop | Tails' rocket | Time Attack | Tornado | Totem pole