How to export multiple OBJ files (it's an animation) with just one MTL file in Blender?

Hi guys, quick question is that possible to export multiple OBJ files (it’s an animation) with just one MTL file?
So I need those OBJ files but I only need one MTL file.
I don’t really want to manually to relink all the OBJ files. It’s gonna be a lot of work, the animation is like 200+ frames, so there is 200+ OBJ files and 200+ MTL files.
Does anyone how to do that in blender or anyone know how to write a python loop script to do that?
Cheers

Of course it’s possible but the question would be: why the extra work?
The obj-exporter exports different mtl-files because you could change the material in an animation. If not, then they are all the same and technically you can rename one from all the filename_00anynumber.mtl to for example mymaterial.mtl and change this in all your obj-files to the line mtlib mymaterial.mtl
Of course you save disk space, but does it matter?
Or do you really wanna extend the obj-exporter with a switch : material is unchanged, just export one mtl-file…

Thank you for your reply. The thing is I don’t want to do that manually, just tryna find a better way to do it.
Cheers