From Bulbapedia, the community-driven Pokémon encyclopedia.
Reggie (Japanese: レイジ Reiji) is Paul's older brother. He is a Pokémon Breeder living in Veilstone City.
Reggie first appeared in Lost Leader Strategy!. During this meeting, he and Ash battled in a three-on-three match; although Ash's Staravia lost to his Swalot, Turtwig and Pikachu successfully defeated his Bibarel and Staraptor respectively.
Reggie has earned the 8 Badges from Kanto, Hoenn and Sinnoh. He has also challenged the Battle Frontier and won six of the seven Frontier Symbols. He decided to become a breeder after failing to get the Brave Symbol, as revealed in Aiding the Enemy. Unlike his younger brother, he treats his Pokémon with love and care and thanks them after working hard in a battle. This difference was also noted by Zoey who said that Paul and Reggie seemed like complete opposites.
In Crossing the Battle Line!, Reggie and his Staraptor helped Ash's Staravia to learn Brave Bird. He appeared again in Enter Galactic! where he used Paul's Electabuzz to help Ash fight Team Galactic.
He made a cameo appearance in Saving the World From Ruins!. He also appeared in A Pyramiding Rage!, where he watched his brother's battle against Brandon. In this episode Reggie's loss against Brandon, which was being watched by Paul, was shown in a flashback. Back then he was told by Brandon that he lacked a unique battle strategy which is why he gave up on being a Pokémon Trainer. This incident is what caused Paul to be more focused on a Pokémon's strength than anything else.
Reggie reappeared in Pedal to the Mettle! and Evolving Strategies! to watch the battle between Ash and Paul, which was suggested by him at the end of A Pyramiding Rage! to see how far the two Trainers have developed.
He reappeared in Familiarity Breeds Strategy! and explained that work was keeping him from attending the Lily of the Valley Conference. After discussing Paul's Pokémon line-up and what he had learned as a result from meeting Ash, Reggie encouraged his brother to win. After that, he was seen watching the battle on television between Paul and Ash.
Reggie seems to have the same attitude towards Pokémon as Ash, which is very surprising seeing as that he is the older brother of Paul. He has become friends with Ash and his friends. Several people have noted that Reggie and Paul are as different as Ash and Paul are.
It was mentioned in Lost Leader Strategy! that Reggie takes care of Paul's other reserve Pokémon as well. Paul had left Electabuzz with Reggie prior to Lost Leader Strategy! and had taken it back before Chim - Charred!.
Other Pokémon seen in Reggie's care
It is unknown if any of these Pokémon belong to Paul; possibly none of them, given Paul's recruitment methods. Also, Paul may not be the only Trainer Reggie looks after Pokémon for and the above ones may belong to other unknown Trainers.
All Badges and Symbols were obtained prior to his debut appearance in Lost Leader Strategy!.
Indigo League Badges
Johto League Badges
Hoenn League Badges
Sinnoh League Badges
Battle Frontier Symbols
|| レイジ Reiji
|| Possibly from 礼 rei (courtesy/propriety), as compared to the 信 shin (trust/confidence) in Shinji (Paul).
|| Similar to his Japanese name. Also similar to "Regi", the prefix common to all the names of the legendary golems, the main Pokémon belonging to the one Frontier Brain he couldn't beat.
|| 진환 Jinhwan
|| Shares the character 진 jin with his younger brother.
|| 雷司 Léisī
|| Sounds similar to Reiji. Shares the character 司 with his younger brother. Also similar to 雷吉 Léijí, the common prefix of the legendary golems.