Spike Bar

Spike Bars are spiky obstacles encountered chiefly in Super Mario games. They are similar to Fire Bars, but with spiked balls in place of fireballs. They usually can be destroyed with certain power-up forms, whereas Fire Bars are completely indestructible. If characters come in contact with a spike bar, they take damage.

Wario Land: Shake It!
In Wario Land: Shake It!, spike bars appear in levels that feature Rocket Buckets, such as Airytale Castle and Launchpad Labyrinth. They extend out of a metallic pivot and start rotating around it the moment Wario mounts a Rocket Bucket, retracting when the vehicle is destroyed or abandoned. Spike bars appear with varying lengths, are indestructible, and are always surrounded with coins, collectable by carefully navigating in-between the bars. If Wario flies a Rocket Bucket into a spike bar, the vehicle breaks, forcing Wario to plummet to solid ground. Since they only appear when a Rocket Bucket is in use, spike bars cannot hurt Wario directly.

Super Mario 3D Land
Contrary to Fire Bars, which mostly appear in lava-themed levels, Spike Bars are found in a variety of level themes throughout Super Mario 3D Land. One or two Spike Bars can be found rotating around the same axis, but unlike Fire Bars, Spike Bars never rotate on their side.

Objects similar to Spike Bars, known as spiked rollers, also appear. They automatically roll back and forth along the ground, though they are occasionally swung by chains, giving them vertical movement.

If Mario or Luigi make contact with a Spike Bar or spiked roller in their Statue forms, it breaks and releases several coins.

Super Mario 3D World / Super Mario 3D World + Bowser's Fury
Spiked rollers reappear in Super Mario 3D World and Super Mario 3D World + Bowser's Fury. In Spike's Lost City, some spiked rollers roll perpetually on pendulum platforms. In Spooky Seasick Wreck and Gigantic Seasick Wreck, spiked rollers move gently back and forth with the swaying of the large boats. In Red-Hot Run, some spiked rollers move back and forth on their own, while the others rotate in the air as groups of four, around a fixed axis. In Boiling Blue Bully Belt and Broken Blue Bully Belt, groups of two or four spiked rollers rotate in the air around a fixed axis, either horizontally or vertically. In Footlight Lane, many individual spiked rollers roll around circular invisible platforms, in a portion of the level after the Checkpoint Flag. The last group of spiked rollers must be navigated to reach a Green Star Ring and collect the second Green Star of the level. In The Bowser Express and Champion's Road, several spiked rollers swing back and forth on chains.

Spikes attack by producing spiked rollers and throwing them forward, which roll down the path in front of them. All spiked roller varieties can be destroyed by characters if they assume an invincible state, which includes the Lucky Cat, Invincible, White Tanooki, or White Cat forms.

In Super Mario 3D World + Bowser's Fury, throw spiked rollers identically to normal Spikes during the "So Close Yet So Far" mission of Trickity Tower. After this mission is completed, if Mario leaves the area and returns, the Cat Spikes will permanently disappear from the area.

Super Mario Run
Spike Bars return in Super Mario Run as obstacles in the level Spike Bar Jungle, and are designed to look closer to their original appearance from Super Mario 3D Land, but with extra spikes. This is its only appearance where the bar is connected to a Hard Block with a cog. Albeit indestructible in this game, Spike Bars can be bounced on safely by Yoshis.

Captain Toad: Treasure Tracker
Spiked rollers appear in Captain Toad: Treasure Tracker and its Nintendo Switch and Nintendo 3DS ports, once again thrown by Spike, although only in the level Windup Stairs.

Mario Party: Star Rush
In Mario Party: Star Rush, Spikes produce spiked rollers in Roller Revenge.

Mario + Rabbids Kingdom Battle
A spiked roller can be found at Underwater Village, a location in Spooky Trails from Mario + Rabbids Kingdom Battle. It is stuck between some plants grown away from the main path. Beep-0 notes that whoever owned the spiked roller left the area quickly, claiming this to be "an ominous sign". The weapons Spike Strike and Big Spike are designed after spiked rollers, though their description refers to them as Skewers.

Mario Tennis Aces
In Mario Tennis Aces, Spike produces a spiked roller and uses it to hit the tennis ball in his Special Shot.

Paper Mario: The Origami King
In Paper Mario: The Origami King, some spiked rollers can be seen in the Spike's quarters alongside some Spike Balls in Bowser's Castle.