That's correct. Ideally, you should set the camera position and lighting in a way that resembles the third game, render the animation (you need to know the required number of frames) with an alpha channel, and then TrueMefista will put it all together in the style of a GIF, but in a format that the third game's engine supports.
However, in my opinion, the color palette and proportions of the models differ significantly from the third game. I would suggest using models from the 6th or 7th part instead, as they have realism in proportions, just like in the third game, rather than stylization. And the color palette can be adjusted in Photoshop or similar programs.
2 **TrueMefista**
It would be better for you to write a technical specification, specifying which animations are needed, how many frames per animation (maybe frames per second? I'm not sure what's best), and which creatures. If the request is clearer, someone might be willing to take it on.