ItemDex - Power Belt

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

Item guide - Game Data - Pokemon Revolution Online

ItemDex - Beast Ball, ultra beasts serebii

ItemDex - Beast Ball, ultra beasts serebii

Power Belt - Bulbapedia, the community-driven Pokémon encyclopedia

PokeMMO Item Dex 2019 - Work In Progress Guides - PokeMMO

Pokégear - Bulbapedia, the community-driven Pokémon encyclopedia

ItemDex - Adrenaline Orb

Held Items - Pokemon Sword and Shield Guide - IGN

ItemDex - Focus Sash

539 Sawk Pokedex - Pokemon X and Y - The PokéMasters Pokédex

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