From the Super Mario Wiki
The Motion-Sensor Bomb is an item used in the Super Smash Bros. series. Various versions of the item have appeared in the series, but they all function similarly. Once used, the bomb is set on the ground or another surface until someone gets close enough to it, causing it to explode.
In the Japanese version of Super Smash Bros. Melee, the Motion-Sensor Bomb is actually a Proximity Mine from Perfect Dark. However, in the North American and PAL versions, it is still the Proximity Mine from GoldenEye 007 (although in the actual trophy description, its game of origin is sneakily listed as "Top Secret").
In Super Smash Bros. Brawl, the Motion Sensor Bomb has a more unique design, since Nintendo could no longer use the GoldenEye 007 design due to Rare being bought out by Microsoft. In Super Smash Bros. Brawl, unlike in the previous games, the Motion-Sensor Bomb can disappear in a set amount of time, hindering its effectiveness.
The Motion-Sensor Bomb reappears in Super Smash Bros. for Nintendo 3DS / Wii U and Super Smash Bros. Ultimate, with another redesign: the item now looks like a small bright-red dome with what appears to be an eye design on top and purple frame.
Super Smash Bros. Melee
Super Smash Bros. Brawl
Super Smash Bros. for Nintendo 3DS / Wii U
Name in other languages