Swapping Mewtwo in to Politoed instead of swapping in palkia/ferro is likely what cost you the game. If palkia was swapped in, you could spam thunder if you had it, and cause Ginjaninja a lot of trouble. This would mean when keldeo was brought in, you could likely sac someone to secret sword, and bring in mewtwo.
Here's another of my battles. I had fought this person before, but he had to leave before we could finish it.