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.
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Here's another of my battles. I had fought this person before, but he had to leave before we could finish it.
http://www.pokemonshowdown.com/replay/ubers9247055