Benji's Meganium

Benji's Meganium is his starter Pokémon and closest companion.

As a Pokémon available for use at Professor Elm's lab
Benji first encountered Meganium as a Chikorita when he was going to pick out his starter. Unfortunately of the three starters, Cyndaquil and Totodile had gotten into mischief, resulting in their capture by Team Rocket. Benji and Chikorita teamed up and ended up saving the two. While picking his starter, Benji decided that Chikorita was the one and chose her.