Rarevio is an online Pokémon Trading Card Game database and collection platform for collectors. Its searchable catalog spans cards from sets across the history of the game, with filters for set, card type, energy, rarity, color, sort order, and language. Card pages include images and current CardMarket prices, alongside price histories to help users research cards and follow market values. The site also highlights valuable cards, recent sets, popular Pokémon, and cards listed for trade.

Collectors can create a free account to track cards they own, monitor set completion by rarity, build a wishlist, and record incoming orders. Wishlist tools let users follow market prices and receive alerts when a card reaches a chosen target price. Rarevio also supports trading between collectors: members can mark cards as available and browse listings from other users. For those with an existing collection, the platform can import Cardmarket or PriceCharting exports, as well as CSV and Excel spreadsheets, matching cards automatically.