Crate

This contains one to three items. Since it's so heavy, only DK can carry it around. A Crate (, Box) is an item that has appeared in every game in the Super Smash Bros. series. Crates are containers which can hold various different items or up to three of the same item. Because Crates are very heavy, a character who has picked up a Crate will not be able to jump or attack at all while holding it, and they cannot be picked up in mid-air. After being picked up, a Crate can be thrown in any regular direction (up, forward, backward, or down). Crates are very similar to Barrels.

Exploding Crates are "dud" Crates that do not contain items and explode when destroyed, delivering strong damage and knockback to players caught in the explosion, even to the player who threw the crate. In all five games, every crate has a one in eight chance of being an exploding crate.

Rolling Crates
Rolling Crates are a type of Crate that first appeared in Super Smash Bros. Brawl. These Crates are identified by their tiny, black wheels on the bottom, and can oftentimes go unnoticed. They also always spawn at the same angle, unlike normal crates. If a player hits this Crate without destroying it, it will start sliding in the direction it was hit. Characters hit by the Rolling Crate will take damage and knockback depending on the speed of the Crate, and the Crate normally breaks. Characters can stand on them, even when in motion.

In Super Smash Bros.
In the original game, a character who has picked up a crate will not be able to move at all (in addition to being unable to jump or attack). However, exclusively has a special ability allowing him to move and jump freely while holding a Crate.

In Super Smash Bros. Melee
Characters (other than Donkey Kong) carrying a Crate can now move very slowly while holding it, but cannot walk off ledges; if the control stick is held down, the character and the Crate will both tumble off the ledge and they will drop the Crate. retains his ability to move freely while holding Crates and other heavy objects.

In this game, Crates have a small random chance of containing an enemy from Adventure Mode, such as a ReDead, Goomba, or an Octorok. When they are thrown at opponents, they can deal 18%-22% damage and have a decent amount of knockback.

In Super Smash Bros. Brawl
Crates, along with Barrels, can now have a different appearance depending on the stage played on. On futuristic stages such as Lylat Cruise, they take on a futuristic appearance. On more fantasy-based stages such as Yoshi's Island, the crates will look like wrapped-up presents. gains knockback-based super armor when carrying a crate, similar to his forward throw.

In Super Smash Bros. 4
Crates (including rolling crates) return in Super Smash Bros. 4. The futuristic crate now sports a new design, with the Smash logo on the sides. The present crate has been redesigned as well, with an obvious lid and no horizontal ribbons on the sides.

In, for unknown reasons, all familiar stages except for Smashville use the normal wooden design regardless of the crate design they had in Brawl.

In Super Smash Bros. Ultimate
Crates and Rolling Crates return in Super Smash Bros. Ultimate, using their designs from Super Smash Bros. 4.

Origin
The is a common real world item, which the Smash version is directly based off. Usually made of wood or metal, the crate is primarily used as a shipping container for particularly large objects that could easily be damaged outside of an enclosed space.

Trivia

 * In in update 1.1.0, rarely when a crate is broken, certain items will briefly float in mid-air before falling on the ground.
 * In Brawl and both versions of SSB4, it is possible for a fighter to momentarily perform their "crate pick-up" animation without actually picking the crate up. This only seems to happen if they are a slight distance away or in front of the actual crate.
 * On the image for Milestones in, blue and green present crates are shown, despite only red presents being usable.
 * In both versions of SSB4, if a character gets grabbed when turning around while carrying a crate or another heavy item, they will face the background instead of the screen. This is known as the Backwards Glitch and it was first found by DeadDraco. This only works with playable characters whose positions get mirrored when turning around, so they can face the screen regardless of whether they're facing right or left.
 * The characters who can perform this glitch are: Mario, Luigi, Bowser, Bowser Jr., Wario, Kirby, Charizard, Jigglypuff, Greninja, Duck Hunt, R.O.B., Dr. Mario, Pac-Man, Mega Man, Sonic, Mii Brawler, Mewtwo and Ryu.
 * A destroyed crate shares its animation with the Barrel, showing a large smash symbol, even though it's small on the Barrel.