I had a PM asking me to explain STAB, the Same Type Attack Bonus, as apparently I'm the "only one" who actually knows how much moves get boosted by. I doubt that, but thought I might as well write a proper explanation for anyone else who's wondering. STAB is a 50% boost to a move's power when the Type of the move is the same as the Type of the Pokemon using the move. Whatever the power was before, it gets multiplied by 1.5 or 150%. e.g. If the base power of the move was 90 and it's used by a Pokemon of the same Type, it becomes 90 x 1.5 = 135. All power boosts are cumulative. So, if you have a Fire-type Pokemon using a Fire-type attack while Sunny Day is in play, you get the x 1.5 boost for STAB, which then gets multipled by another 1.5 for the Sunny Day bonus. 1.5 x 1.5 = 2.25, so your move power more than doubles. e.g. If Charizard uses Flare Blitz, base power 120, while Sunny Day is in force: the new power of Flare Blitz is 120 x 1.5 x 1.5 = 120 x 2.25 = 270. Things get really interesting if your Charizard's HP are below 1/3 of the maximum, because then its Blaze ability kicks in, providing yet another 50% boost. So with Charizard + Sunny Day + Blaze: the new power of Flare Blitz is 120 x 1.5 x 1.5 x 1.5 = 120 x 3.375 = 405!! Of course, Flare Blitz has recoil damage, so your Charizard with less than 1/3 maximum HP would proceed to launch one ridiculously powerful attack and knock itself out. But it would go down in a Blaze of glory! (sorry ;D). Pokemon with dual Type get STAB for both Types, which is why it's worthwhile having one move of each of those Types in its moveset. So with, say, Dialga, a Steel/Dragon Pokemon, you want one high power Steel move and one high power Dragon move, plus two other moves of different Types to cover weaknesses. Any questions?