Treecko, along with fellow Hoenn starts Torchic and Mudkip, are arguably the most common Generation III pokemon in the Total Pokemon World.
Treecko was one of the original 30 contestants and his personality was similar to that of Geoff from Total Drama Island. He was Smoochum's girlfriend before they broke up later on. Treecko would evolve into Grovyle early on in season 1 and would eventually participate in all 4 seasons.
Treecko was eliminated early but then returned and was a major source of comic relief along with Lickilicky and Chimchar. Treecko would be in the bottom 2 3 times in a row from final 9 to final 7 before being eliminated by Raichu (the host) at the final 6, despite Treecko having won immunity in that episode.