>>49904941With their normal abilities the three are well balanced, it is with the inclusion of the HA where the balance is broken, with its speed Greninja was OP with its HA, not to mention the blatant shilling by the anime and its alternate form (Which fortunately is not part of the evolutionary line in the games, this is considered a separate pokemon like the spiky ear Pichu or the black flower Flabebe)
It would have been more balanced to give the rogue pokemon the ability to steal items and the ability multitypes to the wizard and to avoid abuse of this HA, reduce Delphox's speed since it is a classic trope that wizards take its time to recite their spells.