Richie functions as Mohji's loyal pet lion within the Buggy Pirates, accompanying the crew through its various forms: the Buggy and Alvida Alliance, Buggy's Delivery, and later the Cross Guild. Officially classified as a "Big Savage" Type C creature, his large size and fierce appearance in battle contrast sharply with the goofy expressions he often displays while idle. His eye sclerae shift between white and scarlet red in the anime, signaling comical or friendly moods versus vicious or enraged states. Manga art depicts him with golden brown fur and a pink mane, while the anime gives him light green fur and a purple mane. After the timeskip, he gained weight and adopted new attire: a one-piece garment featuring white and orange rhombuses and a white frill collar. Despite his intimidating presence, Richie exhibits kitten-like behavior. Though capable of human-like mannerisms, his intelligence is limited, dominated by an intense focus on food. Crewmates sometimes misinterpret his dramatic reactions to food as emotional responses to sad or touching events. His combat abilities leverage his status as a large lion, relying on biting and mauling attacks. Demonstrated strength includes destroying a thick iron cage that Roronoa Zoro doubted he could cut and knocking Monkey D. Luffy through a wooden building with a single paw strike. However, his wild nature and lack of tactical intellect leave him vulnerable to faster, stronger opponents. Gluttony is a significant weakness, as hunger distracts him from objectives, exemplified when Usopp pacified him using Tamago Boshi. His history spans numerous arcs. During the Orange Town invasion, he and Mohji assaulted Chouchou before Luffy defeated them. In the Loguetown Arc, they attempted to burn the Straw Hats' ship but failed due to rain, leading to Mohji accidentally knocking himself out. The Buggy's Crew Adventure Chronicles cover story showed Richie becoming temporary captain after sleepwalking and defeating Cabaji and Mohji; the crew was later captured by the Kumate Tribe until Buggy rescued them. Post-timeskip, he attended a feast on Karai Bari Island (Zou Arc) celebrating business gains after Donquixote Doflamingo's defeat. Following the dissolution of the Seven Warlords system, he was present during the Marine assault on Karai Bari, which triggered Crocodile's intervention and the formation of the Cross Guild. Non-canon appearances include the 3D2Y special, where he witnessed battles involving Luffy and Boa Hancock against the World Pirates, frequently fixating on food like ice cream and melon during crew activities. In the film *One Piece: Stampede*, Richie attended the Pirates Festival on Delta Island as part of the Buggy Pirates' security detail. He also appears in video games like *One Piece Treasure Cruise* and *One Piece: Grand Adventure*, functioning as a playable character, enemy, or support unit.