What it does
Magic Powder is a Psychic-type status move that makes the target purely Psychic-type, stripping out all of its original typing. Once it lands, the target has exactly Psychic's weaknesses (Ghost, Dark, Bug) and resistances (Fighting, Psychic), with no trace of whatever it was before.
The real application: it removes immunities and resistances the target had from its original typing. A Ground-type immune to Electric? Change it to Psychic and that immunity is gone. A typing combination that resisted your coverage? Gone. One move rewrites the target's entire weakness chart for the rest of the time it stays in.
Who runs it
Hatterene at 5% — extremely rare. Hatterene is Psychic/Fairy with high Special Attack and Magic Bounce, normally slotted as a special attacker. The Magic Powder sets it up as a type-manipulation support tech instead.
How to use it
Magic Powder is about creating a coverage window. If your team runs Ghost- or Dark-type attacks but a specific opponent has immunities or strong resistances that block your damage, changing them to Psychic opens a 2x super-effective hit for exactly those attacks.
Timing matters in doubles. Hatterene needs a safe turn to use this — it's not a common enough tech for opponents to predict reliably, but you still need to protect it from priority attacks or being targeted directly. Magic Bounce reflects status moves back but doesn't help against physical attacks coming in.
Tips & strategy
This is a one-turn tech, not a long-term control play. The effect disappears when the target switches out, so you need to follow up immediately — same turn with your partner or next turn before the switch happens. The longer the gap between Magic Powder landing and your coverage attack, the less the move was worth the slot.
It's only relevant against specific opponents where the type change actually matters. Against a matchup where the target's original typing wasn't blocking your attacks anyway, the slot is wasted. That's why 5% is already a generous number.