For information about stats in the other games, see the Statistics.
Power Stats are special stats listed on the Skylanders website and on the cards that came with figures of Skylanders from Spyro's Adventure to Trap Team, and the stickers that came with SuperChargers. They are cosmetic only and not used in any of the Skylanders games. The console games use their own set of stats, whereas the 3DS game doesn't use stats at all.
Many fans mistakenly assume the Power Stats in older games to be reflective of a Skylander's performance in the game, despite numerous sources indicating them to be only cosmetic and sometimes entirely different from their real stats.