The Riches (Japanese: ブルジョワールけBourgeoir family) are a family of seven living in Undella Town in Pokémon Black and White. Six members of the family, Draco, Susan, Clairdonna, Zillion, Trish, and Miles, can be battled; the seventh member is Draco's father, an item maniac who buys Relic items found in the Abyssal Ruins as well as flutes.
In Pokémon Black and White, the player may challenge the family to battle once a day, and all battles for that day happen with no break between them. Originally, only Draco can be challenged, outside the villa. Once the player wins against Draco outside the villa and Draco moves inside the villa, whenever the player defeats every family member that was inside the villa when they started battling, a new family member will appear and challenge the player, until all six of the battling family members are around the table. A family member who has appeared will remain even if the player loses against them, meaning that the player may lose against a new family member one day, and encounter another new family member the next day. Once the player wins against Miles, the final battling family member, the player will not be able to challenge the family again.
In Pokémon Black 2 and White 2, the Riches' house has been demolished and a Maid states that they moved far away. Miles and the item maniac, however, are in a newly-built house on the original land plot. An NPC inside the house wonders why only the father stayed.
Trish first appears in A Week to Go and Old Wounds, where she is seen traveling to the Mistralton Cave with her friend, Shoko. When Shoko is too reluctant to go into the cave to find the Legendary Pokémon inside, Trish gets angry at her timid nature and decides to go in there by herself. Although she finds Terrakion and Virizion inside, Trish is easily defeated and knocked unconscious. While Black battles the two Pokémon in an attempt to save her, Trish eventually wakes up and becomes furious when she finds out that she was held captive. Shoko attempts to get Trish to stop trying to go after Virizion and Terrakion, but Trish refuses, as she wants to have an adventure that can't happen if she continues her normal sedentary lifestyle.
Trish attempts to capture the two, but her plan is interrupted when the third member, Cobalion, comes in and knocks her away. The attack causes one of Trish's dropped torches to set the whole area on fire. Cobalion, Virizion, and Terrakion manage to put out the flames, but they also take Trish and Shoko's Pokémon away from them. Eventually, Black manages to track and convince the three into releasing Trish and Shoko's Pokémon back to their Trainers.
Trish later appears at the Pokémon League alongside several other Trainers to help battle Team Plasma. Together, they face the Seven Sages in battle to rescue the Gym Leaders by Team Plasma. After succeeding and the Seven Sages escaped, Trish and the others helped defeat the Grunts attacking innocent bystanders below.
According to herself, Trish initially had an easy life growing up, albeit without any talent. Shoko encouraged Trish to pursue dreams and adventures that were not easy to attain, such as catching Legendary Pokémon. In turn, Trish saw Shoko's talent and encouraged her to start up a Patrat Show on Marvelous Bridge.
Heatmor is Trish's only known Pokémon. She used it in her trek through the Mistralton Cave. Soon after, it was kidnapped by Cobalion, Terrakion, and Virizion but was later convinced to be returned to its Trainer by Black. At the Pokémon League, it helped rescue the kidnapped Gym Leaders.