What is the evasion increase from Sand Veil?

okay in most sites it says 20% evasion increase but some also says 25%.and it also says increases evasion by 1 stage meaning 25% increase. so would a 100% accurate move like surf be 80% or 75% accurate? bulbapedia is a total mess here, on the sand veil page it says pokemon with this ability will get 20% evasion increase and on the sandstorm page it says pokemon with the sand veil ability will increase their evasion by 1 stage which is 25% increase. but in serebii it says increase evasion by 1 LEVEL not stage. which is actually true?PS:i actually tested using this ability, i made my breloom and gliscor fight with each other and while gliscor was activating his sand veil ability with sandstorm, i made breloom use stone edge with pp max on it which is 8 pp and none of them even missed. so that made me wonder if its really 60%or65% accuracy (which ever it is) for stone edge or could it be more

Pleaselog inorregisterto add a comment.

http://www.smogon.com/dp/abilities/sand_veilIn battle 20%

Sand Veil increases the evasion of a Pokémon by 20% in a sandstorm and if on a Pokémon whose type does not already, grants immunity to damage taken from sandstorms.In battle - bulbapedia 20%

Raises the Pokémon’s evasion during a sandstorm by one level - serbii 25%

During a sandstorm, this Pokémon has 1.25× its evasion, and it does not take sandstorm damage regardless of typeThe evasion bonus does not count as a stat modifier.Overworld: If the lead Pokémon has this ability, the wild encounter rate is halved in a sandstorm - veekun -25%

Boosts the Pokémon’s evasion in a sandstorm. This Pokemon’s Evasion rises one level during Sandstorm.- pokestation

http://pokemondb.net/ability/sand-veil- our very own site :D 20%

http://pokemon.neoseeker.com/wiki/Sand Veil- pokemon wiki 20%

im not entirely sure but i am going to go for 20% because of all the websites ive looked on appart from serbii have by the looks of it not that reliable infoto be honast 5% doesnt make that much differance

anyway i have just looked up similar ability snow cloak and that does 20% evasion in hailstorm

hope this helped