According to Japanese magazine Nintendo Dream, their October 2019 issue confirms that Monster Rancher will be releasing for Nintendo Switch (Thanks, Gematsu). However, it is still possible that more platforms could be confirmed at a later date.
Monster Rancher first released for the PlayStation 1 on November 30th, 1997 and this port is an updated version. First developed by Tecmo (now Koei Tecmo), this monster raising simulator included a unique feature with CDs at the time. Inserting a CD into the PlayStation would generate a new monster. It is unknown how this feature will be changed for the Switch release.
Stay tuned at Final Weapon for more Monster Rancher news when it’s available!