Honestly, there is only one way i can think of doing this, and it would involve making several different monsters(frames) for every animated monster you want to create, and alot of fuck annoying eventing, so what you're looking for will most likely be a lagging pain in the ass, but possible.
A lighter alternative to this, you might say? Oh well i suppose i have two ways of doing this ._.
If you've ever heard of Romancing Walker, It's probably one of the best 2k RPGs out there. Not the best, but still worth a look. Let's take a page out of that book: 2k does not have a side view system like 2k3, it has a front on system. Characters were not represented on the screen at all, with the exception of a name with health attached to it. The creator of RW obviously did not like this, so they went ahead and created their own special battleanimation set for the attacks: the screen would darken, a picture of the hero would appear, they'd blow the enemy up and then everyone would be happy. so theoretically, you could do a similar thing with your monsters. If you do this, you should probably only make these for special attacks, or have your characters attack in the same way, else the flow could get real slow.
If you cannot visualize what i'm talking about, go google Romancing Walker (The english translation) download it and then see for yourself .-.