Polvo brillo da 10% de evasión, Velo Arena 25%, Doble Equipo sube un 100%
La evasión base de todo Pokémon es 100.
La formula según Bulba pedia
P=Abase x Accuracy/evasion
Where:
Abase is the base accuracy of the move (in percent - e.g. a base accuracy of 95 is counted as 0.95),
Accuracy is the current accuracy stat of the user (in percent - e.g. raising accuracy by three stages raises this number to 3), and
Evasion is the current evasion stat of the target (in percent - e.g. lowering evasion by two stages lowers this number to 0.6).
If P is greater than 1, the move will surely hit. In a 2-on-2 battle, it is possible for a move that hits two or three targets to miss some of the targets and hit others - the probabilities are calculated individually for each target.
1x1/2.35=0.42, entonces hay 42% de acertar el golpe contra Garchomp.
Sin doble equipo: 0.74=74%
Eso suponiendo que entienda como funciona esta cosa y que no haya cambiado en XY.