Why I am asking this is because I been shiny hurting for a few weeks for a shiny eevee on black2 in Castalia city. and I keep running in to Audino,so I think it may been breaking my shiny chain.
P.s I haven't turn my game off.
You can't chain Pokemon in Black/White 2. The only ways you can shiny hunt are by using the shiny charm or masuda method. Trying to find a shiny Eevee by just running around in the grass will only give you a 1/8192 chance of finding one. Try breeding with the masuda method if you really want a shiny.
Hope I helped!