I've never been really clear on how to use a function from one quest in another quest's stage. Here's what I'm trying to do in the fragment:

Alias_RoseliaPrevolve.GetReference().DismissFollower()Alias_RoseliaPrevolve.GetReference().disable()Alias_PKRoseradeEvolve.GetReference().enable()Alias_PKRoseradeEvolve.RegisterforSingleUpdate(1)  

I have the script extending DialogueFollowerScript, but it says that "DismissFollower is not a function". How do I get it to recognize functions from other scripts?

There's a SetTeammate function, but no GetTeammate function...not sure how to find the hook for the current teammate in order to dissmiss them...if you can get the follower reference, you could just do a Disable() on them, and then do an Enable() at the end of the quest.

If I disable it does it automatically set my TeamMateCount such that I can get another animal companion?

You can use SetTeammate to clear teammate status. The first arg is a bool : true for set, false for clear.

I'm not sure if that stops them following you though. You may need to clear the follower package as well.