How do I open .dat files from Monster Rancher games?

This is a serious question that would need some attention because I wanted the models from the PS2 Monster Rancher games to be included in the Models Resource.

Here are the links to those .dat files via my Google Drive:
MF3.dat: https://drive.google.com/file/d/1NpiXyd2pxQwyuEoBIE3HTBeFKIRgg4-f/view?usp=drive_link
MF4.dat: https://drive.google.com/file/d/1wNq0c61ZR8GQdnuIknqm7u6aCF_zIsuV/view?usp=drive_link
MF5.dat: https://drive.google.com/file/d/1wcKIQLa474IMYUsjNoKPiTcYszbIiEAR/view?usp=drive_link
And their corresponding SLUS files:
SLUS_201.90 - https://drive.google.com/file/d/1-Z-1pUlBFNsl9TpuazmbqQaJTaS8F7Rx/view?usp=sharing
SLUS_207.02 - https://drive.google.com/file/d/1t7I3a3brkxBAiELTESbDnPkrJNH6j0-s/view?usp=sharing
SLUS_213.30 - https://drive.google.com/file/d/1iaFZEmjmmrkjV3Y5bXudSWcAP5dHAmXZ/view?usp=sharing

If you have any info in any of these, please let me know, the more the merrier as they say.
And I'll thank you in advance, so that way people like you and me can enjoy this together.