Motion-Sensor Bomb

When thrown, these will activate wherever they land. The first character to approach an active bomb is in for a big surprise! The Motion-Sensor Bomb (, Sensor Bomb), also referred to as Proximity Mine in PAL and Japanese versions of Super Smash Bros. Melee, is an item seen throughout the entire  series that will attach itself to the nearest solid part of the stage when thrown, be it ground, wall, or ceiling. It will then stick there until something hits it, be it an attack, a character or an item. If touched, it will explode and deal out a great amount of damage and knockback.

Origin
In both GoldenEye 007 and Perfect Dark, there is an item called the "Proximity Mine". The mines in each game have a different appearance but largely the same function: the player simply throws the mine on any surface and waits for the enemy to walk by it. If the enemy gets too close, it explodes and causes powerful splash damage, enough to easily kill the victim. It is also possible for the player to be killed by their own Proximity Mine.

In the Super Smash Bros. series, the Proximity Mine is renamed to "Motion-Sensor Bomb" and it acts the same as it did in GoldenEye 007 and Perfect Dark. The design of the Motion-Sensor Bomb in Super Smash Bros. and international releases of Melee resembles the design in GoldenEye 007; meanwhile, the design in the Japanese version of Melee resembles the proximity mines from Perfect Dark. The design of the Motion-Sensor Bombs in Brawl, Super Smash Bros. 4, and Ultimate don't resemble either mine, and now have their own unique appearance.

Overview
In SSB and Melee, when lying on the ground after spawning, it will be grey, but once thrown onto a wall or floor, it will glow green, as well as make its signature noise when it hits the ground, alerting others of its presence. In Brawl, the mine no longer glows; however, it gives a small beeping noise shortly after it has been deployed. It will also disappear if it takes too long to be set off. In SSB and Melee, the mine cannot explode before it is armed by a player. From Brawl onward, however, attacks and stage hazards will automatically cause an unarmed mine to explode, making them more dangerous in general.

In the North American and PAL versions of Melee, beta gameplay shows that the item was to look more similar to its appearance from rather than GoldenEye 007. This was changed in the final versions for unknown reasons; even the Japanese language option in the North American version does not revert the item to the same appearance as in Perfect Dark and the Japanese version of Melee.

Since Brawl, the design of the bomb has been consistent between regions. In addition, both Brawl and Smash 4 gave the item a redesign, with Ultimate retaining the design of its predecessor. In Ultimate, the Motion-Sensor Bomb triggers the game's special slow-down zoom effect when someone touches it, regardless of if it will KO anyone. It gives off a signature beep during this slow-down, before exploding when speed returns to normal. Additionally, the bomb now becomes semi-transparent once planted, making it harder to see, especially on bright stages or stages with similar colour schemes.

Damage
Note, in Brawl the Motion-Sensor Bomb cannot be dropped while on the ground, pressing the drop input will make the character perform a forward tilt throw.

In Super Smash Bros. Melee
The Motion-Sensor Bomb trophy has a different design between Japanese and international releases. In international releases the design from ' is used while in Japanese releases the design is from '. The Japanese version lists the game of origin as "" (which is a transliteration of "Perfect Dark (N64)"), though if the language is set to English it will change to "Perfect Dark (5/00)". It also uses the PAL description when changed to English, which is missing the text ". It adheres to" after "the Carrington Institute" (changed to "spies and other stealthy operatives" in NTSC).

Trivia

 * Despite western versions of Melee stating the Proximity Mine's origin as "TOP SECRET", the game's credits still mention Perfect Dark.
 * "Motion-Sensor Bomb" is a word-for-word translation of the name given to the Proximity Mine in the Japanese release of GoldenEye 007.