Shū uses a device called the In-Com, a headset which was created by his father that lets him talk to his Pokémon. He also uses a Pokédex.
He has a terrible aim and frequently misses his targets when throwing Poké Balls.
Shū is enthusiastic and often comes up with bizarre but effective schemes for capturing wild Pokémon, such as dressing up in giant Pokémon suits. He is especially loyal towards his Pokémon, although his Pikachu is willful and will refuse orders. His rival is Tomio.
History
Shū met his Pikachu in Enter Shū & Pikachu! when he found Pikachu's Poké Ball abandoned in a forest. Apparently, the Poké Ball had become defective and was releasing Pikachu's electricity everywhere. Shū was able to fight against the current and release Pikachu, after which they became partners. Even though they are close friends, they argue constantly.
Pokémon
Unlike in most other Pokémon canon, Shū does not seem to have a limit on the number of Pokémon he may carry with him.
Pikachu is Shū's main partner on his team and has been used more times than his other Pokémon. Despite their hard times with each other, both Shū and Pikachu remain to be friends.
While Shū was in a Pokémon Get Match with his rival, Tomio, a Nidoran♂ shows up. However, before Shū can catch Nidoran, his leg appears to be in bad shape, so Nidoran was set free. After the contest, Nidoran shows up as soon as Shū was about to lose and joins Shū on the journey.
Shū caught sight of Poliwag while he was taking his break. This made him want to catch it. However, it was very fast as Shū kept on having trouble trying to catch it on his own. As Pikachu was able to use Thunderbolt, Shū was finally able to catch Poliwag.
Ditto was disguised as a Moltres when Shū entered town. As Moltres was a legendary Pokémon, Shū wanted to capture it. However, after its capture, it turned out to be a Ditto.
Shū is first seen using a Ponyta in his battle with a Trainer named Ken in Battle in the Fog. Shū uses Pontya to jump high above the battlefield so that Pikachu can attack from above. Ponyta appears again in Plague on the Bellsprout, when Shū uses it in battle against a wild Bellsprout he intends to capture.
Jynx first appears during Shū's travels in Kanto. Later, she assisted Shū in capturing Lugia by using an icy attack to freeze the waters to make it easier for Shū to cross.
Shū caught a Parasect and gave it to Ran as Parasect had the ability to make medicine, and Ran wanted the Parasect so she can take care of her ailing father.
After a heated battle, Shū succeeded in capturing Lugia with the help of Pikachu, Hitmontop, Jynx, Ursaring and Wooper. It then left so it can continue to protect the ocean.