This article contains a list of glitches from Knuckles the Echidna in Sonic the Hedgehog 2. Unless otherwise noted, all glitch names are conjectural. Many of them have not been confirmed by Sega.
List of glitches
When Knuckles defeats Dr. Robotnik in Casino Night Zone, a wall will disappear. If he is on the wall when this happens, his climbing sprite will remain in mid-air until he jumps off.
Main article | Staff | Manuals | Glitches (Sonic 2, Knuckles in Sonic 2) | Beta elements | Gallery | Prereleases (Nick Arcade | Simon Wai) | Re-releases (2006 | 2013 | Sega Ages)
||Sonic (Super Sonic, Glitch Sonic) | Tails (Super Tails**) | Knuckles (Super Knuckles) | Dr. Robotnik | Animals (Becky, Cucky, Flicky, Pocky, Pecky, Cucky, Ricky, Picky, Rocky, Locky, Wocky, Micky, Tocky)
||Aquis | Asteron | Balkiry | Banper* | Batbot** | BFish* | Bubbler* | Bubbler's Mother* | Buzzer | Cactus* | Chop Chop | Clucker | Coconuts | Crawl | Crawlton | Flasher | Frog* | Gator* | Gohla | Grabber | Grounder | Jellygnite** | Lobster* | Masher | Nebula | Octus | Rexon | Shellcracker | Slicer | Snail* | Spiker | Spiny | Stegway** | Turtloids | Redz** | Whisp
||Emerald Hill Zone | Chemical Plant Zone | Aquatic Ruin Zone | Casino Night Zone | Hill Top Zone | Mystic Cave Zone | Oil Ocean Zone | Metropolis Zone | Sky Chase Zone | Wing Fortress Zone | Death Egg Zone | Green Hill Zone* | Hidden Palace Zone** | Genocide City Zone* | Sand Shower Zone* | Rock World Zone* | Wood Zone* | Egg Gauntlet Zone** | Boss Attack Zone** | Proto Palace Zone** | Special Stage
||Drill Eggman | Water Eggman | Tonkachi Eggman | Catcher Eggman | Submarine Eggman | Drill Eggman II | Hidden Palace Zone boss** | Submarine Eggman II | Flying Eggman | Barrier Eggman | Mecha Sonic | Death Egg Robot
||Climb | Glide | Insta-Shield** | Propeller Flying | Spin Jump | Super Dash Attack | Super Spin Attack
||Air Bubble | Bomb | Booster | Bumper | Capsule | Continue | Fan | Flipper | Iron ball | Jump Panel | Metal nut | Monitor (Super Ring, Shield, Power Sneakers, Invincible, Extra Life, Teleporter, Eggman, Lightning Shield**, Flame Shield**, Random, Water Shield**, S**) | Ring | Signpost | Spring | Spring Catapult | Star Circle | Star Post | Switch
||Original Soundtrack | Bumper wall | Cannon | Chaos Emerald | Conveyor Belt | Corkscrew loop | Crusher | Death Egg Robot | Debug Mode | Egg Jet | Giant spear | Gondola | High-speed elevator | High-speed warp tube | Mega Mack | Perfect Bonus | Seesaw | Shuttle loop | Slot machine | Spikes | Stone pillar | Time Attack | Tornado | Totem pole | West Side Island | Winding Tunnel
*Exclusive to the prototype versions of Sonic the Hedgehog 2.
** Exclusive to the 2013 re-release version.