Mariah's Oddish is an Oddish that befriended Mariah.
Oddish was a Pokémon that joined Mariah. Seeing the Hoppip flying away, Oddish wished to fly as well, but constantly failed. Seeing the other Hoppip being gusted by the tornado, Oddish went with Ash, Misty, Brock and Mariah to search for them. When it saw Hoppip being captured by Team Rocket, it battled their Arbok, Weezing and Meowth, defeating them. It saw while it cannot fly, it has great battle skills.