Riolu

Riolu is a Fighting-type Pokémon introduced in Generation IV, making its debut in the Sinnoh region. Known as the Emanation Pokémon, it is a pre-evolution of the popular Pokémon Lucario, evolving when it levels up with high friendship during the day. Riolu is distinctive for its ability to sense auras, which allows it to perceive emotions and even distinguish between people and Pokémon based on their unique energy signatures. Its diet is not explicitly detailed in the games, but as a Fighting-type, it is often depicted as agile and disciplined, engaging in rigorous training to hone its abilities. In the anime, Riolu has played significant roles, often portrayed as a loyal and powerful companion, notably with Ash Ketchum in Pokémon Journeys. Its type matchups include weaknesses to Flying, Psychic, and Fairy types, while it resists Rock, Bug, and Dark types. Riolu's evolutionary line, culminating in Lucario, imbues it with a degree of cultural significance, as Lucario is a fan-favorite and has even appeared in Super Smash Bros.