What it does
Toxic Debris places one layer of Toxic Spikes on the opponent's side of the field each time the holder is hit by a physical move. Toxic Spikes stack up to two layers: one layer poisons switching-in Pokémon, two layers inflict badly poisoned status (damage that increases each turn).
Trigger: physical moves only. Special moves don't activate Toxic Debris. Every time the opponent hits you physically, the spikes go down automatically.
Immunities to Toxic Spikes: Poison and Steel types can't be poisoned and are immune to the effect. Ghost types bypass entry hazards entirely. A Poison-type Pokémon switching in actually removes one layer of Toxic Spikes rather than getting poisoned.
Any field-clearing move (Defog, Rapid Spin) removes the Toxic Spikes Toxic Debris laid down, just like manually placed ones.
Who runs it
Glimmora is the standard Toxic Debris user (98%). Rock/Poison typing gives it relevant defensive properties and immunity to poison itself, so the spikes it sets up don't slow it down. Physical bulk is enough to absorb multiple hits and keep triggering the ability.
Glimmora can also use Toxic Spikes manually — combining passive Toxic Debris triggers with manual placement can stack to two layers quickly. The Rock/Poison defensive profile lets it stay in long enough for both to happen.
How to use it
Core plan: keep Glimmora alive on the field, let the opponent's physical hits trigger Toxic Debris while Glimmora uses its other moves. Use Toxic Spikes directly to accelerate stacking to two layers. Once both layers are up, every switch-in the opponent makes costs HP.
Protect buys Glimmora an extra turn to accumulate hazard layers. Stealth Rock stacks a second damage source on top of Toxic Spikes — combining both makes each opposing switch-in increasingly costly.
The opponent may bring a hazard clearer (Defog or Rapid Spin). When they clear, the cycle resets: Glimmora gets hit again, spikes go back up. Each time the opponent spends an action clearing spikes, you've effectively forced them to waste that turn.
Tips & strategy
Toxic Debris only triggers on physical moves. If the opponent's entire team uses special moves, passive triggering never happens. Against special-attacker-heavy teams, Glimmora has to use Toxic Spikes manually and can't rely on Toxic Debris to do the setup work.
Toxic Spikes are more valuable in singles, where the opponent can't choose two Pokémon immune to the hazard at once, and switching to escape poison has a higher cost. In doubles, if one of the opponent's two active Pokémon is a Ground-type (which bypasses the spikes), half the field is unaffected.
Ground-types don't touch the ground (in terms of entry hazard mechanics) — Toxic Spikes don't affect them. They're the most direct counter to this strategy. Building a team to handle Ground-types is necessary if Glimmora's hazard pressure is going to matter.