Shu uses a device called the Income, a headset created by his father that lets him talk to his Pokémon. He also uses a Pokédex. He has terrible aim and frequently misses his targets when throwing Poké Balls. Shu 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 very loyal to his Pokémon, though his Pikachu is willful and will refuse orders. His rival is Tomio.
This section is incomplete. Please feel free to edit this section to add missing information and complete it. Reason: information from GDZ09 - onwards.
Shu met his Pikachu in Special Chapter: I Caught a 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. Shu was able to fight against the current and release Pikachu, after which they became partners. Even though they are close friends, they argue constantly.
Shu made his first official appearance in Shu and Pikachu's Debut! traveling with Pikachu. While encountering a Caterpie, he has Pikachu battle it before a Pidgey eats it for dinner. Pikachu refused as he was tired and fell asleep in a hanging sleeping bag. Pikachu told Shu to capture it himself. Shu tried many tactics to catch Caterpie but they all failed. Shu tried the Transformation Tactic as his last tactic by dressing up as one. As Caterpie got distracted by the sight of Shu's disguise, Shu escaped from his costume and caught Caterpie. As Shu was celebrating, a flock of Pidgey grab him by the costume as they think he was their dinner. Shu was freed by Pikachu as the flock released him from midair and as they crashed, Shu and Pikachu go back to their arguing.
In A Powerful Opponent, Venusaur!, they get lost in a forest and while Shu quietly sneaked in the grass, he bumped into a Venusaur. He pulled it out to get a closer look but Venusaur started to become angry at Shu for doing so. As Pikachu battled it, Shu told him to get away from Venusaur as it was too big. Shu eventually protected Pikachu after Venusaur was about to attack him with its vines. The bond between Shu and Pikachu caused Venusaur to cease its attacks.
In A Match For Pokémon, Shu attempted to catch a Venomoth but Tomio beat him to it. Tomio accused Shu of being a slowpoke when he was unable to catch Venomoth as well as other Pokémon from a couple of meters away. Shu, insulted, challenged Tomio to a match to see who can catch the most Pokémon. The match went underway, and by the time it was sunset, Shu had 19 Pokémon. He encountered a Nidoran♂ and since Nidoran♂ had an injured leg, Shu gave him a bandage instead of capturing him. As the contest concluded, Shu had caught fewer Pokémon than Tomio so he was about to give up his Pokédex until Nidoran♂ and its family showed up and the match went to Shu.
Shu arrived in Celadon University in The Challenge at Celadon University!. A gatekeeper stopped him before Shu went in. The gatekeeper gives him an entrance exam in order to determine if Shu will be allowed in. Shu answered the question correctly and went in. He went to the Chemical Research Laboratory first and was given more questions during his journey in Celadon University in which he incorrectly answered the first as it was asking for the highest price tag instead of the tallest.
Shu heard a noise in the Pokémon University Hospital and went to check it out, which was a Machamp struggling during treatment. Shu tried getting Machamp to calm down with Pikachu's Thunder Shock but it made Machamp more angry and destroyed a fish tank containing a Magikarp. Shu jumped in to protect Magikarp and gets pounded on by Machamp. Eventually, Magikarp saved him with Dragon Rage as it wanted to do the same that Shu did for it. As Shu saved the university, he was rewarded with a medal with Magikarp and Gyarados engravings on it.
In A Farfetch'd Fencing Match!, he attempts to catch a Farfetch'd but Farfetch'd sliced the Poké Ball in half. Farfetch'd's Trainer, Ryoma, arrived and accused Shu of stealing his Farfetch'd. Ryoma battled Shu after making fun of Shu and Pikachu. Shu had trouble keeping up with Farfetch'd since it was too fast. Eventually, Shu came up with a technique called Lightning Sword and defeated Ryoma and Farfetch'd.
While Shu was in a Pokémon Get Match with his rival, Tomio, a Nidoran♂ shows up. However, before Shu 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 Shu was about to lose and joins Shu on the journey.
Shu caught sight of Poliwag while he was taking his break. This made him want to catch it. However, it was very fast as Shu kept on having trouble trying to catch it on his own. As Pikachu was able to use Thunderbolt, Shu was finally able to catch Poliwag.
Oddish first appeared in Honey-Loving Oddish where it was seem devouring some honey. Oddish originally belonged to another Trainer where it had a battle with Shu. After defeating Oddish, the Trainer gave Oddish to Shu as an apology for what it did.
Shu caught Spinarak after Pikachu weakened it. During an encounter with Rin and Ran, he sent it out to escape from them. Later, when Shu was falling down, he sent Spinarak out to save him from the fall using Spider Web.
Hitmontop debuted in the chapter as a Tyrogue when he was thrown out of the dojo for being too weak. After Shu took him in and trained him, they went back to the dojo where a battle with a Machoke caused Tyrogue to evolve into Hitmontop. With Hitmontop's newfound power, he was able to defeat Machoke.
Shu met Sneasel during his travels on the mountains. He was able to catch it by putting it in the water. This Sneasel is a trickster as it would steal items from people or Pokémon. Despite that, it respected Shu as its friend.
Shu sent out Slowbro to take on a wild Jynx Shu wanted to catch. However, it was placed to sleep by Jynx's Lovely Kiss. It is not known if Slowbro evolved from Slowpoke or Shu caught it as a different Pokémon.
Shu encountered Celebi after meeting Hideki. He and Hideki encountered it again in Catch Celebi! (Part One) where Shu was able to catch it in Part Two. After seeing the rest of its species, Shu decided to release Celebi.