Motion-Sensor Bomb

The Motion-Sensor Bomb is an item used in the Super Smash Bros. series. When set down on the ground, it glows a green color, and when any player steps on it, it will automatically explode. It first appeared in Rare, Ltd.'s GoldenEye 007. In the Japanese version of Super Smash Bros. Melee and beta versions of the American localization, the Motion-Sensor Bomb is actually a Proximity Mine from Perfect Dark. It is unknown why the item was changed to the Motion-Sensor Bomb from GoldenEye 007. Its name in the PAL version is also Proximity Mine, despite being the GoldenEye 007 Motion-Sensor Bomb.

Motion-Sensor Bomb
''The perfect accessory for ambushes, the Motion-Sensor Bomb has been a favorite covert weapon of spies and other stealthy operatives. It adheres to any surface, and once armed, detonates with incredible force when it detects motion in its range. In the frantic world of Super Smash Bros., it doesn't take long for it to go.''

Proximity Mine (Beta)
''The perfect accessory for ambushes, the Proximity Mine has long been a favorite covert weapon of the Carrington Institute any surface and once armed, detonates with incredible force when it detects motion within its range. In the frantic world of Super Smash Bros., it doesn't take long for it to go.''

Trophy Information from Super Smash Bros. Brawl
''An item that, when placed, will detonate when someone gets too close. It can be stuck on ceilings, walls, and floors. It doesn't matter who places this thing--it'll explode regardless of who passes by. Its explosive power is high, and it launches players with ease. It's small and lies almost flat on surfaces, so it can be very difficult to see.''

Trivia

 * In GoldenEye 007, the Motion-Sensor Bomb did not have the green aura surrounding it when activated; this effect was added exclusively for Super Smash Bros. Melee.