Bruce, Shan

ブルース・シャン

The Invincible Pokémon Brothers display extreme arrogance, asserting that they are famous globally and targeting individuals they deem inferior. Yet, behind this facade, they are merely petty cheaters who rely on underhanded tactics and ignore regulations. For instance, they might have their Pokémon pretend to be disabled, only to strike an opponent when their guard is lowered, even if that opponent is attempting to assist. In another instance, if the brother currently battling is losing, the other two will release their Pokémon to overwhelm the opponent(s).
The brothers are so delusional and self-righteous that they genuinely believe they are not cheating and will argue that they played fairly if their misconduct is pointed out. For example, when Misty confronted them for illegally sending out two extra Tentacruel to attack her Corsola in Cerulean Blues, Kim claimed it was a challenge from the Invincible Pokémon Brothers as a group, ignoring the rule that the match should be one-on-one. After Nurse Joy disqualified them for this violation, they protested, insisting they had won "fair and square," which led her to additionally ban them from all official Pokémon matches.
The brothers are capable of significant cruelty, such as ordering their Tentacruel to attack Misty's Gyarados with Poison Sting in an attempt to pressure Nurse Joy into lifting their ban and awarding them the victory. This cruelty intensified when Misty dove in to protect Gyarados; they not only had Tentacruel attack Misty but also took amusement in her risk of drowning. Ultimately, they turned cowardly upon realizing their defeat was unavoidable; they panicked and tried to surrender in a pathetic manner, only to be blasted away along with all their Pokémon.