If a cavalier and her mount both have the feat Pack Flanking, they are considered to be flanking if adjacent or sharing the same square. Is this still true if they do a charge attack?
Yes with some problems.
1) The mount cannot take Pack Flanking.
As a result the only time the mount would have it is when the Cavalier gives it to the mount via the tactician ability which is very limited in use (one plus once every 5 levels per day).
2) Both the cavalier and the mount have to be threatening the target. This means that for the cavalier to benefit the cavalier cannot be using a reach weapon (unless somehow the mount had a 10' reach).
Ok. I just wanted to make sure of the rules for this.