A black-red hybrid card, for example, is playable in blue-black, black-red, and red-green
The Werewolf double-faced cards would have a Human side and a Werewolf side
While the "ease of flipping" category is, in large part, a product of the number of defense counters on the battle (battles range from three to seven defense counters, and a battle with three defense counters will be much easier to flip than one with seven), it also takes other factors into consideration, like whether the battle makes creatures (if so, we can use them to help defeat the battle, making it easier to flip) or whether the battle acts as removal (which can get a blocker out of the way, making it easier to attack and defeat the battle)
Played right, this convoke deck can quickly overwhelm your opponents (though keep an eye out for board-wipes, which could really set you back)
Zarude [Gamestop] #56 Pokemon Pitch Black Keep track of your collection value over time