Brown, yellow, blue, silver
Blocking the route Heavy protrusion
Rock'n ( ロックン Rokkun ) ? is an enemy that appears in  and its locked-on expansion Sonic & Knuckles . It is a mass-produced Sonic the Hedgehog 3 & Knuckles Badnik model created by Dr. Robotnik.
Rock'ns are disguised as breakable sand blocks found in the
Sandopolis Zone. When they rise up, they display a pair of black eyes and a grey lower body with blue legs.
Sandopolis Zone, Rock'ns are not easily discovered due to their resemblance to the local sand blocks. When the player approach them, the Rock'ns will rise up and begin pacing towards the playable character.
Rock'ns do not have any offensive attacks to use against the player. However, they can push the playable characters into harm's way, such as
crushing pillars which (unsurprisingly) are placed close to them. Rock'ns cannot be smashed by Spin Jumping on top of them due to their outer shell. Instead, the player must use the Spin Dash on the Rock'ns lower half to defeat them.
Main articles ( Sonic the Hedgehog 3, Sonic & Knuckles, Sonic the Hedgehog 3 & Knuckles, Sonic & Knuckles Collection) | Gallery ( Sonic the Hedgehog 3, Sonic & Knuckles, Sonic & Knuckles Collection) | Beta elements ( Sonic the Hedgehog 3, Sonic & Knuckles) | Staff ( Sonic the Hedgehog 3, Sonic & Knuckles, Sonic & Knuckles Collection) | Glitches ( Sonic the Hedgehog 3, Sonic the Hedgehog 3 & Knuckles, Sonic & Knuckles Collection) | Manuals ( Sonic the Hedgehog 3, Sonic & Knuckles)
Sonic ( Super Sonic, Hyper Sonic) | Tails ( Super Tails) | Knuckles ( Super Knuckles, Hyper Knuckles) | Dr. Robotnik | Mecha Sonic ( Mecha Sonic's Super State) | Animals ( Flicky ( Flicky's Super State), Pocky, Pecky, Cucky, Ricky, Rocky)
Batbot | Blaster | Blastoid (Carnival Night Zone) | Blastoid (Hydrocity Zone) | Bloominator | Bubbles | Bugernaut | Butterdroid | Catakiller, Jr. | Chainspike | Clamer | Cluckoid | Corkey | Dragonfly | EggRobo | Fireworm | Flybot767 | Hyudoro | Iwamodoki | Jawz | Madmole | Mantis | Mega Chopper | Monkey Dude | Mushmeanie | Orbinaut | Penguinator | Pointdexter | RhinoBot | Ribot | Rock'n | Sandworm | Skorp | Snale Blaster | Spikebonker | Spiker | Star Pointer | Technosqueek | Toxomister | Turbo Spiker
Angel Island Zone | Hydrocity Zone | Marble Garden Zone | Carnival Night Zone | IceCap Zone | Launch Base Zone | Special Stages | Bonus Stages
Sonic & Knuckles
Mushroom Hill Zone | Flying Battery Zone | Sandopolis Zone | Lava Reef Zone | Hidden Palace Zone | Sky Sanctuary Zone | Death Egg Zone | The Doomsday Zone | Special Stages | Bonus Stages
Azure Lake Zone | Balloon Park Zone | Chrome Gadget Zone | Desert Palace Zone | Endless Mine Zone
Doctor Robotnik’s Flame Craft | Doctor Robotnik’s Whirlpool Machine | Tunnelbot | Self D-Struct Machine | Iceball | Swing’m Spikez | Hei Hou | Gapsule | Barrier Eggman | Guardian | Heat Arms | Egg Mobile-H | Flying Eggman | Red Eye | Death Ball
Doctor Robotnik’s Flame Craft | Doctor Robotnik's Waterspout and Depth Charge Machine | Doctor Robotnik’s Jet Drill Pod | Doctor Robotnik's Energy Ship | Doctor Robotnik’s Freeze-O-Matic | Ball Shooter | Beam Rocket | Big Arm | Jet Mobile | Hang Mobile | Egg Golem | Hot Mobile | Knuckles | Mecha Sonic | Mecha Sonic's Super State | Great Eggman Robo | The Doomsday Zone
Bound Jump | Double Jump | Fireball Spin Dash | Glide | Gliding Knuckles Attack | Hyper Flash | Insta-Shield | Propeller Flying | Spin Jump | Spin Dash | Spin Attack | Wall Climb
Air Bubble | Balloon | Banana | Bomb | Booster | Bumper | Bumper wall | Cannon | Capsule | Change | Chaos Emerald | Cloud | Continue | Fan | Jump Stand | Monitor ( Water Shield, Flame Shield, Invincibility, Lightning Shield, Super Ring, Super Shoes, Extra Life, S, Eggman) | Movable box | Mushroom | Pulley | Ring | Signpost | Self-Propelled Bomb | Slow-Down Shoes | Snowboard | Sphere | Spikes | Spring | Spinning Top | Star Post ( Star Circle) | Super Emerald | Switch | Transport | Vine | Zip Line
Angel Island | Barrel | Blue Knuckles | Conveyor Belt | Corkscrew loop | Crusher | Debug Mode | Fireball Cannon | Flipper | Flywheel | Freeze | Giant spear | Goal | Gravity Control Switch | Gumball | High-speed elevator | High-speed warp tube | Icicle | Iron ball | Jewel Radar | Perfect Bonus | Platform-raising Wheel | Pole Elevator | Relief | Reverse | Ring Shooter | Rock Drill | Seesaw | Shuttle loop | Slot machine | Snowblower | Sonic & Knuckles • Sonic the Hedgehog 3 | Strange Relief | Time Attack | Tornado | Warp Point | Winding Tunnel | Wonderman