Which Pokémon Game is Best for a Mono-Type Grass Team?

Have you ever felt the urge to only try one specific type of Pokémon throughout an entire game? Well whether you have or not, Mono-Typed teams are super fun to figure out, but they can still be challenging, especially if the type inherently has a number of flaws already such as Grass. But since it IS always the first of the starters types let's consider which Pokémon game might be the best possible case for you try using a team of nothing but Grass types!