For the remainder of the current turn, Ion Deluge causes all Normal-type moves to become Electric-type instead, including status moves. Ion Deluge has a priority of +1, so it is used before all moves that do not have increased priority.
Ion Deluge does not affect Struggle. It does not affect Conversion, which still takes into account a move's original type; therefore a Pokémon with a Normal-type move at the top of its move list (including Conversion itself) using Conversion will become Normal-type and not Electric-type even under the effect of Ion Deluge. Moves that change type, such as Judgment or Revelation Dance, are affected by Ion Deluge if they would otherwise deal Normal-type damage. Moves with a charging turn will only change type if the user is affected by Ion Deluge on the turn the move does damage.
If the move Flying Press used by a Pokémon with Normalize is affected by Ion Deluge, it deals Electric/Flying-type damage. If the move Freeze-Dry used by a Pokémon with Normalize is affected by Ion Deluge, its ability to hit Water-type Pokémon super effectively does not stack with its Electric typing (a Water-type Pokémon hit by the move will only take ×2 damage); in Inverse Battles, Freeze-Dry affected by Normalize and then Ion Deluge will hit Water-type Pokémon super effectively.
Due to a glitch, in Version 1.0 of Pokémon Ultra Sun and Ultra Moon, Ion Deluge always fails when used.
If powered up by an Electrium Z into Z-Ion Deluge, the user's Special Attack stat rises one stage.
Generation VIII onwards
Ion Deluge cannot be selected in a battle.