>>32456507Yes. It's viability fluctuates wildly by tier as well. Ubers it's almost not a gimmick choice anymore, since it shuts down so much, and hazards are rare.
To wit, Xerneas (Who it also generally indirectly cripples since it wastes Power Herb), Kyogre, many Mewtwo, most Mega-Moms, many Palkia and Dialga, some Genesect, and a handful of others are usually hardwalled by Shedinja.
It also beats Deoxys, 100% of the time if has a Sash, many Greninja, can at least cripple, but sometimes 1v1 Aegislash if played well, can beat lunaala if Shadow Shield is broken, and a few other surprising match-ups go well for Sheddy.
Plus, it works wonders as a pivot (Lugia's Ice Beam will fuck your Zekrom, so switch to Shedinja to eat the beam, then switch to Zekrom to catch the Toxic), and as
>>32456504 mentioned, as a tool for making people not risk their 1 pokemon that can actually hit it, force them to switch to their thing that can threaten it and making them predictable, or if they catch you with your pants down with P-Don, they spend the turn setting rocks instead of setting up and sweeping you like they should.