Kodama is Tagg's male Trevenant, and the seventh Pokémon he caught in Kalos. Kodama was once a human child in medieval Kalos before dying of starvation during a famine and participating in a Spirit Game in order to come back in his current form. He then spent the resulting centuries at the same spot where he died until encountering Team Nova, when he joined upon taking their offer of a family, and was caught by Tagg once they reached the League.
Due to spending centuries by himself, Kodama can get rather clingy at times and hates being left alone. He has also been known to spend time pining for his long dead mother.
- Birthday: Unknown
- Age: A few centuries
- Met: Kalos Pokémon League (Originally from Kalos Route 16) (Phantump)
- Ability: Natural Cure
- Ball: Ultra
- Kodama is friends with the rest of Team Nova, considering them family.
- Kodama is named after a type of Japanese tree spirit.