User vanishes, dodging all attacks, and hits next turn. Hits through Protect and Detect.

Shadow Force causes the user to 'vanish' making it semi-invulnerable for the rest of the turn. On the next turn, the user reappears and deals damage.
Shadow Force ignores protection effects such as Protect or Endure and removes their effects until the end of the turn.
If the protection effect protects the entire side of the target's field, it will be removed (even if that protection move does not protect from Shadow Force such as Wide Guard).
If the target Pokémon is immune to Shadow Force (such as Normal-type Pokémon) Shadow Force will not remove the protection effect.
If the user is holding a Power Herb, Shdaow Force executes in one turn.
If the user falls asleep due to Yawn during the semi-invulnerable turn, the damaging turn will be cancelled.
A semi-invulnerable Pokémon can still be hit by moves affected by Lock-On or Mind Reader of if the attacker has the ability No Guard.
Shadow Force does not hit through Max Guard and does not remove its effect.

• In Gen 6 Shadow Force bypasses accuracy and evasion checks to always hit except when the target is in the semi-invulnerable turn of moves such as Dig or Fly.
  It also has double power against targets that used Minimize.
• In early versions of
  SWSH
  Shadow Force can not be selected in battle (fixed in version 1.3.0).
• In
  LA
  Shadow Force is a single turn move, obscures the user and lowers its action speed.
  If used by Origin Form Giratina Shadow Force has 120 power and 80% accuracy
  There is a bug that will cause the game to crash if the Origina Form Giratina is shiny.