Most of the future pokemon in the Violet Book are either depicted as attacking the author or as observed from a safe distance. Iron Valiant is the lone exception, and may fairly be described as the reason we have this remarkable text at all; the book itself implies such with its account of a battle between this pokemon and Iron Jugulus, in which an expeditionary team of scientists are protected by Iron Valiant long enough for them to escape.
Iron Valiant was victorious in the battle, which should not be a surprise; it will be created to be a hero who repels the darkness, and this battle, in particular, is one it was very much designed to win. Of course, students of history are well aware that every faction in wars generally considers themselves the heroes, and fans of Absol are always quick to remind us that 'Dark Type' is not always identical with 'Evil'. We can not be certain that Iron Valiant's creator had justice in their heart, nor can we surely save the future by siding en masse with whoever someday develops this pokemon.
Moreover, at least in the timeline it came from, Iron Valiant failed. What does it mean to be a knight when there is no one left to protect? For an intelligent organic pokemon, like Gardevoir or Gallade, this would lead at minimum to a severe crisis of confidence and a loss of purpose, and more likely to severe depression or even suicide; for Iron Valiant, all we know is that its instincts or programming caused it to leap into action with nary a trace of rust, shooting off tachyon bits and shielding scientists as though it was the most natural thing in the world.