Do what Nalyd said. But to clear it up more...
If you get both of them, lets say, to 275HP, they will not be able to go above that.
Also, when you beat them and continue on he he...
Edit -umm. TO LONG?!? Can you not heal? Have you avoided Monarch?!? You shouldn't be complaining about "too long". If you think that is too long, check out the next surprize...he he.
Oh- . Now that was friendly.