Thanks, I was bored xD Basically iSketch is like online pictionary. One person is picked to draw and iSketch gives them several words to choose from (In this case all the words are Pokemon related). The one the person picks one of the words to draw and everyone has to guess what the word is.
Then for the rest of us, it's basically a race to see who gets the word right first and points are awarded for who gets 1st, 2nd, 3rd etc.
Then when either everyone has guessed or time runs out, a new round starts with a new person drawing. Then when all the rounds have finished (Usually about 10-20) the person with the most points is the winner of the whole game.
Hard to explain sorta xD But it's quite easy when you actually play