ItemDex - Power Belt

Power Belt - Lists all details for the item including descriptions and locations across all Pokémon games

Trade & Item Factions - Developer Blog - Last Epoch Forums

PokeMMO Item Dex 2019 - Work In Progress Guides - PokeMMO

ItemDex - EnergyPowder

Item guide - Game Data - Pokemon Revolution Online

List of items by pocket (Sword and Shield) - Bulbapedia, the community-driven Pokémon encyclopedia

Power Belt, Pokémon items

List of items by pocket (HeartGold and SoulSilver) - Bulbapedia, the community-driven Pokémon encyclopedia

ItemDex - Dubious Disc

List of items by pocket (X and Y) - Bulbapedia, the community-driven Pokémon encyclopedia