I wonder why this card is not played alot. IMO this card is under-rated. It's very useful and can surprise your opponent if played probably. Let's say you have a benched cleffa that has a grass basic energy attached to it. Then you play a promo scyther and attach a grass energy to it and then use energy switch and transfer the grass energy from cleffa to scyther. Now scyther can do 40x2=80 damage to feraligatr the first turn you play it.