>>55508721The elemental monkeys are a failed archetype.
BW was build as a reboot for the franchise featuring no old pokemons until post-game.
They are here to teach and help the player to build a balanced team in terms of type. And also how to use berries as items, with Glutonny Natural gift Recycle, fling and acrobatics they have the tools to use them flexibly through the playthrough.
However they learn the useful moves far too late (levels 30~40) and most players ditch them before that, relaced by other Grass/Water/fire mons.
And in competitive they are useless
Design wise
>>55508743 nailed it