O/X Block

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The title of this article is from the English Super Mario Bros. Encyclopedia, which reportedly sourced some names from fan wikis.
If a higher-priority source is found, then the article should be moved to the new title.

O/X Block
An O/X Block from a 1-Up Chamber in Super Mario World.
Sprite from Super Mario World
First appearance Super Mario World (1990)
Latest appearance Super Mario World: Super Mario Advance 2 (2001)
Variant of Block

O/X Blocks[1] are blocks that appear in the 1-Up Rooms of Super Mario World. When a Prize Block in one of the rows of Prize Blocks in the 1-Up Room is struck, the block turns either into a block with an O on it or into a Brown Block. If an O/X Block turns into a Brown Block when struck, all remaining Prize Blocks in the row will do the same. The order of the blocks that must be struck to reveal an O/X Block is randomized, determined when the Prize Block is hit.[2] Upon the player successfully revealing the first one or two O/X Blocks, each block releases a coin. If a full row of O/X Blocks is successfully revealed, the last one struck in that row releases a 1-Up Mushroom.

While the order is random, a glitch allows the player to successfully execute a perfect score: If the player spin-jumps into the blocks while in Caped form, the Prize Blocks will always turn into O Blocks. However, the row of blocks must be hit in order from left to right.[3] This method does not work in the GBA version.

Gallery[edit]

Names in other languages[edit]

Language Name Meaning Notes
Japanese ◯✕ブロック[4]
◯✕ Burokku 		◯✕ Block
Italian Blocco OX[5] O-X Block

References[edit]

  1. ^ Roberts, Rachel, and Cardner Clark, editors (2018). "Super Mario World" in Super Mario Bros. Encyclopedia: The Official Guide to the First 30 Years (First English Edition). Milwaukie: Dark Horse Books. ISBN 978-1-50670-897-3. Page 69.
  2. ^ Tori of the Star Palace (September 22, 2025). Super Mario World - O/X Block Randomization Proof of Concept. YouTube. Retrieved September 22, 2025.
  3. ^ Kirkman Gaming (January 8, 2023). 🍄 Do you know this TRICK in the 1-UP Bonus Room?? | Super Mario World #shorts. YouTube (English). Retrieved March 30, 2025.
  4. ^ Sakai, Kazuya (ambit), kikai, Akinori Sao, Junko Fukuda, Kunio Takayama, and Ko Nakahara (Shogakukan), editors (2015). "Super Mario World" in『スーパーマリオブラザーズ百科: 任天堂公式ガイドブック』. Tokyo: Shogakukan (Japanese). ISBN 978-4-09-106569-8. Page 61.
  5. ^ Sakai, Kazuya (ambit), kikai, Akinori Sao, Junko Fukuda, Kunio Takayama, Ko Nakahara (Shogakukan), and Marco Figini, editors (2018). "Super Mario World" in Super Mario Bros. Enciclopedia. Translated by Marco Amerighi. Milan: Magazzini Salani (Italian). ISBN 889367436X. Page 61.
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Blocks
Carryable blocks Crate • Crazed Crate • Glow Block • Grab Block • Ice Block • Mushroom Block • Propeller Block • Stone • White Block
Color Blocks Bomb Block (Mario vs. Donkey Kong 2: March of the Minis) • Fire Block • Magnetic Block • Pink Block
Destructible blocks Block (Super Mario 64) • Block (Super Mario Odyssey) • Blue block (Wario Land 4) • Blue block (Wario: Master of Disguise) • Bob-omb Block • Bonfire Block • Breakable block • Brick Block • Brick floor • Brick wall • Brown block • Crate • Crystal Block • Domino block • Doughnut block • Enemy Block • Fiery block • Flame block • Fury Block • Ice Wall • Itodama Block • Jewel block • Mega Block • Metal Block • Peanut box • Pinball digital counter • Pumpkin box • Red block (Wario: Master of Disguise) • Rock Block • Rock Block (Wario World) • Rotating Block • Snow sculpture • Snow Block (Super Mario Bros. Wonder) • Snowman Block • Soft rock • Soft sand • Stone Block • Watermelon block • Yellow Block
Dice Blocks 0-1 Dice Block • 1-10 Dice Block • 1-2-3 Dice Block • 1-2-3 Slow Dice Block • 4-5-6 Dice Block • Bowser Dice Block • Brawny Dice Block • Bronze Dice Block • Creepy Dice Block • Custom Dice Block • Cutie Dice Block • Double Dice • Flutter Dice Block • Friendly Dice Block • Gold Dice Block • Greedy Dice Block • Halfway Dice Block • Jumpy Dice Block • Minus Block • Plus Block • Reverse Dice Block • Risky Dice Block • Silver Dice Block • Slow Block • Slow Dice Block • Speed Block • Speedy Dice Block • Star Block • Super Bowser Dice Block • Super Dice Block • Triple 7 Dice Block • Triple Dice • Warp Dice Block • Wondrous Dice Block
Item blocks ! Block • ? Block • 3-Up Moon Block • 4-Bros. Random Block • 99 Block • Adult Shine Block • Assist Block • Attack Piece Block • Bead jar • Bonus ? Block • Bonus block • Bros. Block • Camera Block • Cap Block • Chance Cube • Chance wheel • Coin Block • Coin Box • Copy Block • Egg Block • Flying ? Block • Flying Gold Block • Gold Block • Hidden Block • Hidden Block (Mario Party series) • Hidden Character Block • Invisible Flying ? Block • L Block • M Block • Mega ? Block • Moving ? Block • Nozzle box • O/X Block • P Block (Mario & Luigi: Paper Jam) • Rally Block • Random Block • Recovery Block • Red Coin Block • Roulette Block • Roulette Coin Block • Shell block • Shine Block • Shiny Block • Sliding block • Small Shine Block • Spiked ? Block • Square cloud • Super Block • Time Block • Warp Block (Mario & Luigi series) • Warp Pipe Block
Platform/floor blocks Arrow Block (Wario World) • Atchi Muite Block • Backflip Block • Bike Pads • Blinking Block • Bomb Block (Wario Land: Shake It!) • Boost Block • Cascading Stone • Cloud Block • Cosmic block • Dash Block • Donut Block • Drop Block • Dropdown Countdown Lift • Dropping lift • Electricity Block • Elevator block • Expansion Block • Face block (platform) • Flip block • Foothold • Fūsen Block • Ground • Hourglass Block • Ice Block • Ice Donut Block • Ice Snake Block • Invisible/flashing block • Jump Transporter • Korogari Ice Block • Lift Block • Light-Up-Lift • Long Jump Block • Marimba Block • Marshmallow Block • Moving block • Music Block • Nebaneba Block • Note Block • Pause Block • Power Meter Block • Push-Block • Rotating Block • Rotating platform • Sand block • Skull Platform • Slow Block • Snake Block • Spike Block • Spin Block (Mario & Luigi: Superstar Saga) • Spin Block (New Super Mario Bros.) • Spring-Up • Squishy block • Start Block • Stretch Block • Super Note Block • Surprise Ball • Tile • Track Block • Trampoline Block • Triangular Block • Ugoku Leather Block • Unbreakable block • Vanishing Block • Vanishing platform • Yureru Block
Switch Blocks ! Switch • ? Switch • 3-2-1 Block • Arrow block • Blue Coin Block • Cap Switch • Certainty Switch • Character Switch • Control Block • Face Block (switch) • Gray P Switch • Kamek Block • Laser Block • Light-Switch • Luigi Block • ON/OFF Switch • P Panel • P Switch • Pole Block • Simu-Block • Star Switch • Switch (Wario Land II) • Switch Block (Super Mario 3D World) • Tatami Block • Timer-Switch
Toggleable blocks ! Block • Color Block • Dotted-Line Block • Flip-Flop Block • Kaeru Block • P Block • Red Block • Shake block • Switch Block (Mario & Wario) • Timer Block • Uncertain Block
Power-ups Cannon Box • Coin Box • Gold Block • Light Box • Propeller Box • Unfurl Block
Living blocks Blitty • Block Boo • Blockhopper • Blokkablok • Brock (Brickle · Britchard · Britta · Broque Madame · Broque Monsieur) • Broggy • Dark Block • Fake Block • Ghost Block • Hot-Hot Rock • Message Block • Partrick • Pile Driver Micro-Goomba • Thwack • Thwack Totem • Wonder Thwack
Miscellaneous 2D block • Anywhere POW • Arrow Cloud • Aurora Block • Block (Wario Blast: Featuring Bomberman!) • Block Buster • Bowser Jr. Block • Checkpoint block • CLEAR • Coin counter • Command Block • Empty Block • Hard Block • Magnet Block • Mystery Box • POW Block • Race Block • Red POW Block • Save Block • Shop Block • Snow block (Mario Kart series) • Spike Trap • Star Block • Super Guide Block • Super Warp Block • Vacuum Block • Warp Block • Warp Box • Wonder POW Block • Yoshi Block
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Super Mario World / Super Mario World: Super Mario Advance 2
Protagonists and allies Mario • Luigi • Princess Toadstool • Yoshi • Red Yoshi • Blue Yoshi • Yellow Yoshi • Baby Yoshi • Dolphin • Bird
Bosses Koopalings (Iggy Koopa · Morton Koopa Jr. · Lemmy Koopa · Ludwig von Koopa · Roy Koopa · Wendy O. Koopa · Larry Koopa) • Bowser • Reznor • Big Boo
Items 1-Up Mushroom • 3-Up Moon • Berry • Bonus Coin • Cape Feather • Coin • Control Coin • Dragon Coin • Yoshi's Egg • Fire Flower • Gray Coin • Lakitu's Cloud • Magic ball • Power Balloon • Super Mushroom • Super Star • Yoshi's Wings
Objects ! Block • ! Switch • Arrow Sign • Beanstalk • Blue Door • Bonus block • Bridge • Bubble • Cloud Block • Coin Block • Coin countera • Count-Lift • Daikon • Diagonal platform • Dotted-Line Block • Empty Block • Escalator • Fence • Flimsy Lift • Floating island platform • Flying Platform • Flying Prize Block • Grab Block • Gray Block • Gray P Switch • Hidden Block • Ice Block • Note Block • Jumping Board • Key • Lift • Message Block • ON/OFF Switch • O/X Block • Piston Lift • Prize Block • Revolving Door • Rope • Rotating Block • Roulette Block • Semisolid Platform • Single Swing Lift • Skull Raft • Snake platform • Spotlight • Spring platform • Star Road • Stretch Block • Switch Block • Triangular Block • Triple Swing Lift • Yellow Door • Yoshi Cloud
Worlds of Dinosaur Land Yoshi's Island • Donut Plains • Vanilla Dome • Twin Bridges • Forest of Illusion • Chocolate Island • Valley of Bowser • Star World • Special Zone
Moves Crouch • Dash • Fly • Jump • Looking up • Shell Toss • Slide • Spin Jump • Stomp • Swallow • Swim
Enemies and obstacles Amazing Flyin' Hammer Brother • Ball 'N' Chain • Banzai Bill • Big Boo • Big Bubble • Big Steely • Blargg • Blurp • Bob-omb • Bony Beetle • Boo Buddy • Boo Buddy Block • Boo Buddy Snake • Boo Crew • Bowser Statue • Bullet Bill • Buzzy Beetle • Chainsaw • Chargin' Chuck • Cheep Cheep • Circling Boo Buddies • Climbing Koopa • Decoy • Dino-Rhino • Dino-Torch • Disappearing Boo Buddy • Dry Bones • Eerie • Falling spike • Fire Snake • Fishbone • Fishin' Boo • Fishin' Lakitu • Floating Mine • Flying Goomba • Fuzzy • Goomba • Grinder • Haunted Hole • Hothead • Ice • Jumping Fire Piranha Plant • Jumping Piranha Plant (Jumping Pumpkin Plant) • Koopa Paratroopa • Koopa Troopa • Lakitu • Lakitu in a Pipe • Lava • Lava Bubble • Lil Sparky • Magikoopa • Mechakoopa • Mega Mole • Monty Mole • Muncher • Ninji • Para-bomb • Para-Goomba • Pillar • Piranha Plant • Pit • Pokey • Porcu-Puffer • Rex • Rip Van Fish • Shell (flashing) • Shifting wall • Skewer • Spike • Spike (Super Mario World) • Spike Top • Spiny • Spiny Egg • Sumo Brother • Super Koopa • Swooper • Thwimp • Thwomp • Torpedo Ted • Torpedo tube • Turtle Cannon • Unshelled Koopa • Urchin • Volcano Lotus • Wiggler
Music "Bowser BGM" • "Donut Plains (Map Screen)" • "Ending" • "Ground BGM" ("Athletic BGM" · Bonus Game BGM" · "Castle BGM" · "Ghost House BGM" · "Underground BGM" · "Underwater BGM") • "Koopalings BGM" • "Title BGM" • "Vanilla Dome (Map Screen)" • "Yoshi's Island (Map Screen)"
Other 1-Up Room • Bonus game • Bonus Star • Fall • Giant Gate • Item Stock • Keyhole • Midway Gate • Sand cloud • Timer • Tourist Tips
Miscellaneous Gallery (GBA) • Glitches • Mario Bros.a • Mario Mania • Mario Pachinko • Mario Slot • Nintendo Kōshiki Guidebook Super Mario World • Nintendo Music (soundtrack) • Pégate a Super Mario World: Super Mario Advance 2 • Pre-release and unused content • Staff (GBA) • Super Mario Embroidery World • Super Mario World (handheld pinball game) • Super Mario World (slot machine) • Super Mario World (soundtrack album) • Super Mario World Coin Game • Super Mario World Lucky Coin • Super Mario World Mario no UFO Crane • Super Mario World Ojama Shoot
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