The hazard switch, formerly called the feature switch, is an exclusive feature in Super Smash Flash 2 which allows players to switch off stage hazards and other stage changes. This was added mainly for tournaments, so that competitive players could play on a wider variety of stages - both neutral and counterpick. It should be noted, however, that despite the hazard switch, some stages are still banned in tournaments, as their layouts, rather than hazards, may damage competitive play.

Though originally appearing in the options menu, the hazard switch has been moved to the stage select screen for Beta in order to be more convenient for players that switch constantly.

List of stages affected by the hazard switch

The following list has all the stages that are affected by the hazard switch and if they are available in competitive play after disabling its hazards.

Stage Element(s) affected by the hazard switch ?
Bomb Factory Prevents the soft blocks and the bomb platforms from spawning. No
Bowser's Castle Prevents the Thwomp from coming and smashing the platforms. No
Casino Night Zone Removes the bumpers. No
Castle Siege Prevents the stage from teleporting to the inside of the castle and the cavern sections. Yes
Central Highway Prevents both platforms on the sides from collapsing. No
Clock Town Disables the meteor shower. No
Crateria Disables the acid rain. No
Desk Prevents the drawers from shutting in if attacked and makes it impossible to use the switch and turn on/off the lamp. Unknown
Devil's Machine Prevents the random messages from appearing. Unknown
Distant Planet Disables the rain that creates a strong water current on the left slope of the stage, it also disables the onions and pellets from appearing. No
Dracula's Castle Prevents the movement of the platforms, keeping them in a horizontal row of three. Yes
Dream Land Prevents Whispy Woods from blowing air and pushing the players around. Yes
Fourside Prevents the flying saucer from appearing. No
Galaxy Tours Prevents the stage from transitioning out of the Starship Mario. Unknown
Gangplank Galleon Prevents the pair of Kremlings from appearing that shoot a cannonball at players. No
Green Hill Zone Makes the central floor indestructible, and prevents the lamppost from appearing. No
Hidden Leaf Village Removes the hurtboxes on the lamps in the background so they don't move. No
Hylian Skies Prevents the stage from transitioning to the Dark World. No
Jungle Hijinx Removes the Cannon Barrel. Yes
Lake of Rage Prevents the red Gyarados from appearing. Unknown
Lunar Core Prevents the damaging red beams from appearing. No
Mushroom Kingdom Prevents the POW Block and the Piranha Plant from appearing, makes the balanced platforms unable to be moved and disables the possibility of warping through pipes. No
Mushroom Kingdom II Prevents Birdo and the Pidgit from appearing, also, logs will not fall from the waterfall. No
Mushroom Kingdom III Prevents the P-Switch from appearing, and disables all of the brick blocks. No
Nintendo 3DS Disables all indie games. No
PAC-MAZE Disables the screen-wrapping feature, allowing normal KO's without having to launch opponents while flinching. Unknown
Peach's Castle Prevents the Banzai Bill from appearing, crashing into the castle and exploding. Also disables the colored switches that generate ! Blocks and pass-through platforms. No
Phase 8 Disables the lava waterfall in the middle of the stage and prevents the lava at the bottom from rising. No
Pokémon Colosseum Prevents the stage from transforming into a different layout. Yes
Rainbow Route Prevents the mirror doors from opening, sucking up and teleporting players to the upper mirror, rendering them helpless. Yes
Saturn Valley Disables the damage recovering factor from the hot spring in the middle of the stage. Yes
Sector Z Prevents the cannons under the Great Fox from shooting its lasers. No
Skull Fortress Prevents the swarm of Mets, Battons and the sole Sniper Joe 01 from coming to the foreground. No
Sky Sanctuary Zone Removes the small blocks on the sides of the stage that fall if stood on. Yes
Steel Diver Removes the low gravity from being floaty. Unknown
Tower of Salvation Removes Mithos Yggdrasill. Yes
WarioWare, Inc. Disables all microgames. Yes
World Tournament Disables the loss of a stock from stepping on the grass, with the grass now acting as a platform. No
Yoshi's Island Prevents the Goonies from appearing and the Winged Clouds from spawning on the sides of the stage. No
Yoshi's Island (64) Prevents the cloud platforms on the side from vanishing if stood for too long. Unknown
Yoshi's Story Prevents the Shy Guys from appearing. Yes