Is there an item/spell/feat that will allow me to charge through a square that is occupied by an ally?
Yes. Don't recall where though. An archetype or teamwork feat perhaps.
EDIT: I think I remember it being one of the martial art style feats, actually.
Dragon Style to be exact.
Then your horse would have to meet the prereqs and take the feat, I presume.
Then your horse would have to meet the prereqs and take the feat, I presume.
Which will require enough Intelligence to be able to take any feat.
My group's ranger is having his lion companion take this feat chain. It's rather interesting.
What if you are charging on horseback?
I would think the charge through feat would work (overrun the friendly and let him choose to avoid you).
Acrobatics is a class skill for the animal companion and it will need improved unarmed strike. I am not sure if allowing a horse to take improved unarmed strike breaks simulation though. Although with dragon style on the horse and ride by attack in difficult terrain you could keep charging right past them and keep on going and they may not be able to reach you if they are slow enough.
The Overrun feat? :)
The Cavalry Formation feat from Ultimate Combat allows you and your mount to overlap spaces taken up by other mounts and riders, and allows you to charge through your allies squares if they also have the feat.
Because it is a teamwork feat, it works best if you are playing a cavalier in order to grant the feat to your allies. I think I'm reading it correctly that an inquisitor with this feat can charge through allies' squares also, but the allies wouldn't be able to charge through the inquisitor's square.
Dragon Style to be exact.
I will have to keep this one in mind.
So would a cavalier's mount AND the cavalier both need Improved Unarmed Strike and Dragon Style in order to accomplish this?
That's a heavy 4 feat tax!
In v3.0 and v3.5, monsters with natural attacks didn't need Improved Unarmed Strike before picking up Improved Grapple (as evidenced by the Bebilith demon).
This may or may not still hold true in Pathfinder.
I think the devs(3.5) just used the rule of cool since RAW would not allow it to work. I personally think natural attacks should have been allowed to count for grab, but per the current rules that is not supported. :(
Can't you just pass through ally squares? Oh nvm 4e.