Conveyor Belt

Conveyors (also known as Conveyor Belts ) are platforms found in many Mario games. They are able to carry the player from one place to another without them having to move at all, and can serve as an obstacle or a means to travel faster, depending on the direction the player is heading.

Donkey Kong
In Donkey Kong, conveyors appear in 50m. This level has a series of conveyor belts which run along the second, fourth and fifth floors.

Mario vs. Donkey Kong series
Conveyors are frequent mechanisms used by Mario and Mini toys throughout the Mario vs. Donkey Kong series. Their design in these games generally features a row of arrows running along their body, pointing in the direction the belts on the conveyors move. They are solid, always horizontal and head either left or right. However, most games feature a Conveyor Switch which allows the player to change the direction of all conveyors on-screen in order to solve puzzles conveniently. In situations where it is possible, conveyors are shown to be able to carry Thwomps in their assigned direction for a short time after falling down on them.

Mario vs. Donkey Kong
In the first installment of the series, conveyors are first found in Level 1-4, Mario Toy Company. Their coloration depends on the world they appear in. Their main purpose is carrying Mario through tight passages, so long as he crouches, as he cannot move by himself while crouching. Conveyors can also be used to ferry keys into more accessible areas near the exit. They also significantly impede Mario's walking speed if he runs against them, although he can still successfully walk in their opposite direction. In levels with conveyors, Mario often comes across gray buttons that he can jump on and press to change their direction. Each button has two red light bulbs on its sides, alternating whenever the button is pressed to signal the change in direction.

Mario vs. Donkey Kong 2: March of the Minis
Conveyors continue to appear in Mario vs. Donkey Kong 2: March of the Minis, debuting with Room 1-7, Mushroom Mayhem. From this game onward, they all appear as gray. Mini Marios that enter a conveyor are glid by the conveyor in direction it moves until reaching its end. Mini Marios turn around when they encounter a conveyor running in the opposite direction.

To change the direction of all conveyors simultaneously, there are green, oblong switches with two arrows pointing away from each other. These are positioned in the walls and the player can tap them with the stylus.

Mario vs. Donkey Kong: Minis March Again!
Conveyor belts work the same in Mario vs. Donkey Kong: Minis March Again!, where they are introduced in Room 3-2, Magnet Mania. Magnet Mania also features a tutorial level that showcases the conveyor.

Mario vs. Donkey Kong: Mini-Land Mayhem!
In Mario vs. Donkey Kong: Mini-Land Mayhem!, conveyors are considerably thinner than in the previous two appearances, though they function in the same way nonetheless. They are the main focus of Teatime Twirl, which also marks the debut of Purple Conveyors. Instead of being fixed in place, the latter can be drawn between any two purple rivets, using pieces acquired in a level to form one-way bridges for the Minis. Conveyor Switches affect these the same as generic conveyors. After Teatime Twirl, both the fixed and the purple variants continue to appear commonly throughout the game. At page 16 in the game's instruction booklet, normal conveyors are called Gray Conveyors to distinguish them from the purple variety. It is also expressly specified in the booklet that Gray Conveyors cannot be moved.

Mario vs. Donkey Kong: Tipping Stars
Both gray and purple conveyors reappear in Mario vs. Donkey Kong: Tipping Stars, where they are introduced in Runaway Warehouse. They are not changed from their previous appearance.

Super Mario series
Conveyor Belts reappear in Super Mario Bros. 2, Super Mario Bros. 3, Super Mario 64, New Super Mario Bros., Super Mario Galaxy, New Super Mario Bros. Wii, New Super Mario Bros. 2, and New Super Mario Bros. U. In Super Mario Bros. 2, they are only found in World 7-2, where their color is purple/red and enemies aren't affected by it, unlike later games. In Super Mario 64, it makes it's first 3D appearance with its color being yellow and having arrows showing the direction it's pointing in the direction it normally goes. In World Flower-Castle in New Super Mario Bros. 2, there are two Conveyor Belts that can change directions and colors (blue or red) by hitting a yellow switch, one of which appears in the battle against Lemmy.

Conveyor Belts also appear in Super Mario 3D World. However, they only appear in the levels Bullet Bill Base and Captain Toad Gets Thwomped.

Conveyor Belts can be used in Super Mario Maker and Super Mario Maker for Nintendo 3DS, where it's possible to adjust their direction, speed, and length.

Mario & Luigi: Bowser's Inside Story
Conveyors appear again in Mario & Luigi: Bowser's Inside Story, where black-colored ones are found in Bowser Path. Bowser can be seen going against a conveyor when for part of his conversation to the Shy Guys he released from the cage.

Super Smash Bros. Brawl
Conveyor Belts also appear in Super Smash Bros. Brawl, as a Custom Stage Builder part. They are unlocked by creating at least five custom stages.

Yoshi's Woolly World / Poochy & Yoshi's Woolly World
Conveyor Belts appear in World 6-6: Feel Fuzzy, Get Clingy in Yoshi's Woolly World and Poochy & Yoshi's Woolly World, where they are made of the hooks from a hook and loop fastener (colloquially known as Velcro). Because of this, Yoshi can cling onto them as they move (hence the level name), allowing him to access unreachable areas. Burrberts can also be found stuck on Conveyor Belts.