I showed this to my friend, and he pointed out that there's a Vanilluxe there, which means it has the advanatge of being fully evolved. Pignite is not.
Don't forget the level possibility. If this is made with levels involved, that Vanilluxe is level 47+, while the pignite is between 17 and 35. So even with type advantage, possible that the level difference makes it harder to win. Who knows, maybe that Vanilluxe has Hidden Power Water, Ground, Flying, or Psychic.