This character is a specific, anthropomorphic Meowth who serves as a prominent member of the villainous organization Team Rocket, consistently accompanying the agents Jessie and James. Unlike nearly all other Pokémon in the anime, this Meowth possesses the rare and self-taught ability to speak human language fluently and walk upright on two legs, which he learned as a kitten to win the affection of a female Meowth named Meowzie. This backstory is rooted in his early life as an abandoned stray in the city of Hollywood, where he survived by joining a gang of feral Meowth led by a Persian. His efforts at transformation backfired, as Meowzie rejected him for being an unnatural freak, a heartbreak that led him to leave the gang and eventually join Team Rocket upon understanding the human word "rocket."

In terms of personality, Meowth is ambitious, conniving, and prideful, often viewing himself as the brains of the Team Rocket trio. He is frequently the mastermind behind their elaborate schemes to steal Pokémon, most notably Ash Ketchum's Pikachu, and designs much of their machinery, including their iconic hot-air balloons. He is deeply loyal to his partners, Jessie and James, regarding them as his only true friends despite their frequent bickering and his occasional feelings of being the odd one out. Beneath his greedy and mischievous exterior, he possesses a contemplative and surprisingly compassionate side, often sympathizing with abandoned or mistreated Pokémon due to his own experiences. He has a well-documented history of developing romantic infatuations with various female-appearing Pokémon, such as May's Skitty, a Glameow, and even the mythical Pokémon Meloetta.

The character's primary motivation is to regain the favor of his boss, Giovanni, the leader of Team Rocket. He aspires to become Giovanni's "top cat," a position he briefly held before being replaced and overshadowed by Giovanni's Persian, a species for which he harbors a lasting resentment. Capturing Pikachu is seen as the key to achieving this goal, leading to elaborate and often unrealistic fantasies of reward. Within the trio's dynamic, Meowth serves as the strategist, technician, and translator. He can interpret Pokémon speech for his human partners and occasionally for Ash and his friends. His relationship with Pikachu is complex, marked by a persistent rivalry as archenemies, yet they occasionally acknowledge that they could have been friends under different circumstances. At times, circumstances force them to cooperate, though a mutual distrust usually remains.

Despite his frequent role as an antagonist, the character has shown significant development. He remains a wild Pokémon by choice, refusing capture inside a Poké Ball. His self-taught human traits came at a significant cost: the immense mental and physical effort required to learn human language and bipedal movement permanently prevented him from mastering his species' signature coin-generating attack, Pay Day. This deficiency generally renders him ineffective in direct combat. However, when deeply motivated by love or a cause he believes in, he has demonstrated formidable battle prowess, capable of defeating multiple trained Pokémon in quick succession. He has also proven his abilities extend beyond scheming, showcasing skills in lock-picking, cooking, and even performing, helping Jessie win several contests. Later revelations indicate that this specific Meowth possesses the rare capacity to undergo Gigantamax, a transformation that grants him a unique and powerful form. His distinct speaking style, often punctuated with a verbal tic, and his tendency to occasionally break the fourth wall have cemented his status as a memorable and enduring character.