Hi, I am making a pro wrestling game,and so far I am almost done, but the only thing is that my model is really big with all the animations. The file size is 8.18 MB, and it seems that the larger the file is, the longer it takes the game to load, so what I am asking is, should I save my models in different files, and use Ent_Morph, to load that certain animation or should I not worry about my model size and continue adding all the animation to the one model.

It depends on how much models you will have at once in real-time. If you are working in a wrestling game, probably you will have four players at once?

That file size dont seems to be a big problem, however you can optimize the model reducing the skin resolution (ex: if you are using 1024*1024 textures you eventually could reduce to 512*512, it depends if you are making close-ups), or you can reduce the model polycount.

If your model size will increase much more than that, then you have a problem.

You could try to delete every second animation frame. But you should make a backup before you do that.
Or you can use bones if you´ve got A6 commercial.

Well, its logical that a model file is large when you have a lot of animation frames and you have models with a really high resolution of polygons. Export your animations with at least 9 frames per cycle and basing on that time-scheme the other finite animations. Use a DDS texture to decrease the size consumpted by the texture. Splitting the model into two different ones with less consumpted space is senseless and could lead to a longer loading time and maybe issues while animating them.

There is absolutely no problem to have models with animations that make the MDLs blow up. Its absolutely ok if they are the only ones that are so big. Though, you should consider to have a look at bones animation. Maybe you can use more animations with less consumpted space with that method.