What the heck are Marshadow, Duralidon, and Amoura? Also, most of them were only done once, and the pokemon didn't have super good stats, like there is no pokemon for if you a rock and Grass type sweeper or a water fighting type that uses special attack. And Legendaries don't really count as having used a type combination in my book, because I don't use them in battle. (It strikes me as unfair.)
Poison and Steel, Electric and Fighting, fighting and fairy, fighting and ground, Ice and Poison, Ice and Bug, Ground and Fairy, Bug and Dark, Bug and Dragon, Rock and Poison, Rock and Ghost, and a Ghost and Fairy type that is more conventionally useful than Mimikyu.