In my B/W game Wynaut can be found in the swarm on Route 2. Since its ability is Shadow Tag what will happen if I bring either a Pokemon that has run away or one holding a Shed Shell?
Run Away allows its user to flee a battle even with Shadow Tag, but not switch out. This can only apply to wild battles. Shed Shell allows its holder to switch out of battle even with Shadow Tag, but not flee. This even applies to trainer battles.
Run Away (Bulbapedia) Shed Shell (Bulbapedia)
The Shed Shell and ability Run Away allow you to flee from all trapping moves and abilities in the wild. You cannot use Run Away in a trainer battle though.
