In all games in the Animal Crossing series, pitfall seeds are items that can be found buried in the ground. If the player or an animal walks over a buried pitfall seed, they will fall and be temporarily stuck in a hole. Players can dig up pitfall seeds and rebury them elsewhere, making it possible to pull "pranks" by setting traps for animals or other players to fall into. Unlike in Smash, buried pitfall seeds are visible in the form of an X-shaped mark on the ground, although they are indistinguishable from other buried items such as fossils.
When thrown, the Pitfall bounces off walls until it touches the ground, which it then embeds itself into with no trace, but will disappear with a puff of smoke after a few minutes. Unless the opponent is invincible, the next enemy to walk onto its location will sustain damage and become buried. Characters on a hard platform will remain buried for the normal duration as determined by their damage, though characters on a soft/fall-through platform will be spiked downwards through the platform after the "buried" animation has finished. This also happens when the item is thrown at a grounded enemy. When thrown at an airborne enemy or at an enemy hanging on an edge, the target is meteor smashed. Having multiple Pitfall items and planting them in the exact same spot can cause more damage than usual.
The Pitfall item appears as a trophy in Super Smash Bros Brawl. It is obtained by completing 100-Man Brawl with any character.