Can I use Thorton to put a Shedinja with "Shell Survival" Ability onto my bench?
No, you cannot.



Shell Survival
Put this Pokémon into play only with the effect of Ninjask’s Cast-Off Shell Ability. (When you are setting up to play, you cannot put it face down as your Active Pokémon or on your Bench.)


Life SqueezePut damage counters on your opponent’s Active Pokémon until its remaining HP is 10.
A most peculiar Pokémon that somehow appears in a Poké Ball when a Nincada evolves.
Can I use Thorton to put a Shedinja with "Shell Survival" Ability onto my bench?
No, you cannot.
Can you use Nest Ball to put a Shedinja with the "Shell Survival" Ability directly into play from your deck since it is a Basic?
No, you cannot.
There’s a new deck building rule with Shedinja from Vivid Voltage. Shedinja with the “Shell Survival” Ability cannot be the only Basic Pokemon in your deck. You must have at least 1 other Basic Pokemon in your deck besides Shedinja with “Shell Survival”.