Sentence:  Pokemon has a <WSD>mulligan</WSD> rule: if you have no Pokemon in your opening hand, you show it to your opponent and redraw. You may also take a <WSD>mulligan</WSD>, I believe, if your opening hand has no basic power cards. 
Meaning of the word marked with <WSD> tags:  An opportunity (sometimes penalized) for a player to reshuffle their cards and draw a new initial hand at the beginning of a game.