I just got a shiny eevee with a + attack - speed nature. What should i evolve it into?
Flareon or Umbreon
Those are the only eeveelutions that use Physical moves that don't need speed. (Although, Flareon could sure as hell use it)
umbreon
The one you like best as a shiny.
>>30110853
Get that blue umbreon
>>30110853
Umbreon. Only other physical slow eevee is Flareon, but don't use Flareon.