The game’s most celebrated feature is its custom Opalian Forms—type/ability/design changes for classic Pokémon. These are not simple re-colors; they feature new sprites, movepools, and often evolve into different forms.

The in-game Pokédex includes:

Since Pokémon Opalo is a fan game, you won't find its data on official Pokémon websites. However, the community has built extensive resources:

Warning for players: Do not confuse Pokémon Opalo with "Pokémon Opal" (an unrelated ROM hack of Pokémon Ruby). Ensure you are looking at Pokémon Opalo* by Pablo y sus amigos.

These Fakemon are fully animated (Gen 5-style battle sprites) and have hidden abilities, egg moves, and evolution methods consistent with official games.

What sets the Pokémon Opalo Pokédex apart from other hacks? It’s the creativity of the "Fakemon." Here are a few reasons why trainers are falling in love with these designs:

Just as Alola has Alolan Forms and Galar has Gigantamax, Tandor has Opalo Forms. These are arguably the biggest selling point of the Pokémon Opalo Pokédex. They reimagine classic Pokémon with new types, abilities, and lore.