Rotom DexSun & Moon #131 Pokémon Card

Rotom Dex is a special form of the Electric/Ghost-type Pokémon, Rotom, which was first introduced in Generation IV as a mischievous entity capable of possessing electronic devices. In its standard form, Rotom is a small, plasma-like Pokémon, but when it possesses appliances like a microwave, washing machine, refrigerator, fan, or lawnmower, it takes on distinct "form" changes, each with unique typing and abilities. The Rotom Dex, however, is a unique iteration introduced in Generation VII with the release of the Pokémon Sun and Moon games. In this form, Rotom possesses a special Pokédex, transforming it into a sentient, interactive device that provides guidance, advice, and even personality to the player's journey through the Alola region. It serves as a comprehensive guide, offering information on Pokémon, locations, and providing helpful features like the "Rotom Loto" and the "Ride Pager." The Rotom Dex is not a battle form but rather a companion, offering a blend of utility and character. Its natural habitat is typically within electronic devices, making it adaptable to various environments where technology is present. Its diet is purely metaphorical, "feeding" on data and information. The evolution line for Rotom is unique in that it does not evolve or devolve, but rather changes forms based on the appliance it possesses. As a Pokédex, it doesn't have traditional type matchups in battle, but its base Rotom form is Electric/Ghost, making it weak to Ghost and Dark types, resistant to Flying, Bug, Steel, and immune to Normal, Fighting, and Poison. The Rotom Dex played a significant role in the Sun and Moon games and anime as a constant companion to the protagonist, offering humor and guidance, solidifying its cultural significance as a helpful and memorable character from the Alola region.