Okay in the previous page someone asked for Shadow Force discussion
So I'm going to try my best on it.
Shadow Force is an underrated move. It is by no means a top tier move unlike Close Combat or Draco Meteor, but it's pretty usable.
Before we start anything let's assume no Normal types are in play, or this move becomes completely useless except for maybe scouting for Blisseys. So get rid of Blissey first.
Let's first look at the move itself. It has a whooping 120 B.P, making it the most powerful Ghost type move in the game. Add STAB, perfect accuracy, a base 120 Attack and Platinum Orb and this move can even dent resisters bar Dialga/Skarmory/Forretress.
This comes at a cost, however, and that's the charge turn. The charge turn telegraphs the attack, which is what hurts this move's viability more than anything else. Although the user is invulnerable during the vanishing period, if the opponent switches in on the charge turn Giratina could be left vulnerable. Giratina, however, has a semi-remedy to this problem: By being as slow as possible
Giratina, at absolute minimum speed, reaches 166, making it as slow as a no Speed Scizor. This means Giratina underspeeds Pokemon such as Metagross and Kyogre, and therefore, if Pokemon like these (I'm not saying Kyogre is going to switch into Giratina, fyi) switch on the turn Giratina is charging, they are forced to attack you first during your invincibility period. Then Giratina unleashes Shadow Force in hopes of doing serious damage, and then it's time for a new turn, allowing Giratina to escape whatever barbaric punishment it could've received if it was faster than the opponent (like a Specs Dragon Pulse from Dialga).
Of course, it's only a semi remedy. There are counters to this move that are not Normal types. Dark or Steel types with really high defense can wall this move and not care. The ultimate non Normal counter to this move appears to be Tyranitar, who resists Shadow Force and is slower than Giratina. Tyranitar can inflict almost lethal damage with Choice Banded Crunch or Payback, and adds Sandstream to the pain due to the item restriction on OriginTina. Beware of Pokemon that can use this move to set up, such as Dialga or Forretress. Darkrai could set up on this move, but it can take over 50% from Shadow Force so it must do so carefully. Since this only covers what could happen if they switched to their Shadow Force resister DURING the charge turn, Giratina can obviously escape punishment if they didn't switch in during the charge turn. If they do, they're risking an Outrage or something else in the face.
So with that said Outrage/Rest/STalk/Shadow Force isn't a bad set. While sleeping, your chances of picking Outrage is increased to 50% as Talk doesn't pick Shadow Force, and when you're awake you have two offensive moves to choose from.