Treecko is a friendly pokemon like most of the starter Pokemon however he also has a stuborn streak so it took a while for Treecko to fully accept Damien as his trainer however when he did he became very loyal to Damien and does his best to make Damien proud, however when damien says or does something Treecko doesnt agree with he makes his opinon known. In battle he makes his stuborn streak fully known. He refuses to give up even when the odds are stacked against him and rather lose then be switched out. Occasionally he can be seen with a twig in his mouth, its unknown why he does this.
Treecko is a small, green, bipedal reptilian Pokémon. It has yellow eyes with long, narrow pupils. Treecko's hands and feet each have three digits covered with tiny spikes. These spikes allow it to scale vertical walls with ease. Its stomach and throat are red. It also has a line across on its stomach resembling a pouch. Treecko has a large, dark green tail with two separate lobes that it uses to sense humidity. This ability allows it to predict the next day's weather.