>>55368522In Pokémon Diamond and Pearl, when pluralized or prefixed with the indefinite article, this item's name is rendered with a lowercase 's' ("DeepseaTeeth" and "a DeepseaTooth", respectively). In Pokémon Platinum and Pokémon HeartGold and SoulSilver, both of these instances are corrected to display with a capital 'S' ("DeepSeaTeeth" and "a DeepSeaTooth", respectively), matching how the item's name would normally be rendered.
