The Pitfall (おとしあなのタネ, otoshiana no tane, lit:Pitfall seed) is an item that appears in Super Smash Bros. Brawl. It hails from the Animal Crossing series. When thrown, the Pitfall bounces off walls until it touches the ground, which it then embeds itself into with no trace, but will disappear after a few minutes. Unless the opponent is invincible, the next enemy to walk onto its location gets driven into the ground and will take some damage; this causes them to be buried if on a hard platform, though if they are on a pass-through platform they will go clean through it and continue downwards. This also happens when the item is thrown at a grounded enemy. This can be used to score easy KOs on custom stages made by the Stage Builder that have pass-through platforms as their base. When thrown at an airborne enemy, the target is Meteor Smashed very powerfully. Buried Pitfalls disappear with a puff of smoke after a long time, if no one goes onto it.
In the Animal Crossing series, it was a somewhat rare item that, when buried, would cause any character except special visitors who walked over it to fall down into a small pit. This item was one of the rarer items in the series and was most commonly found randomly buried. In Animal Crossing: Wild World and City Folk, it was named Pitfall Seed, and was less rare.
The Pitfall item appears as a trophy in Super Smash Bros Brawl. It is obtained by completing 100 Man Brawl with any character.
A tricky little item you can bury. Any player who passes over it will drop into a hole. If you land in a pitfall, move the Control Stick quickly back and forth to escape, because until you do, you're completely defenseless. In Animal Crossing, this item also dropped passersby into holes. It was a thrill to bury one and wait for a visiting pal to stumble across it.
You can plant this in the ground as a trap against your enemies. If they set it off, they'll be rooted in place and at your mercy. If opponents are spending too much time in the air, throwing this at them can send them meteoring down to the ground--or better yet, right off the stage!