If my enemy's Mountrous Mount charges my leader...then I charge his Mount with my own Mountrous Mount...does he lose his charge bonuses, the same way he would if this were with normal cavalry?

I assume 'yes'...but nice to be sure.

Yes

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Coordinator of the Great British Hobbit League

Thanks.

If my Nazgul gets his Fell Beast shot out from under him, he takes a normal Thrown Rider test....not an S3 hit for each inch he falls.
I assume 'yes'...nice to be sure.

Yes

_________________
Coordinator of the Great British Hobbit League