Kricketune is the one pokemon who can put a pokemon to sleep and False Swipe, unless you count maybe Breloom or Parasect. But hey, the cricket is far more accessible. If it's useable, use it, and if it's likeable, like it. No need to put something where it doesn't belong. Some are find just sitting in your party, some are incredibly useful, some are battle-able with.
And alot of pokemon are far more competitive than people think. Cleffa, for goodness's sake, can trade even (slightly pulling up before the revenge sets in) with a pokemon.