The Bright Powder (Japanese: ひかりのこなLight Powder) is a type of held item introduced in Generation II that decreases the opponent's accuracy. Prior to Generation VI, it was formatted as BrightPowder.
In Pokémon Diamond and Pearl, when pluralized or prefixed with the indefinite article, this item's name is rendered with a lowercase 'p' ("Brightpowder" and "a Brightpowder", respectively). In Pokémon Platinum and Pokémon HeartGold and SoulSilver, both of these instances are corrected to display with a capital 'P' ("BrightPowders" and "a BrightPowder", respectively), matching how the item's name would normally be rendered.