I know lots of people go to train with the pangolins in Rome but I havn't seen anyone post what kind of hp you need to stay there. My team has a water with an item mall remote and all of my pets are lvl 92. The lowest hp they have is my fred with 577 hp and highest is an elin with 800+ hp. My Fred spawns from pangolins sometimes but my Niss with 649 hp doesn't spawn. I would suggest atleast 600 - 640 minimum hp to stay at pangolins if you have a water with the item mall remote and can revive. I'll try to give a more specific amount of hp as my Fred lvls.
Hope this information helps ^_^
p.s. - is someone knows the minimum amount of hp you need to fight at sharks can you please post here. I would really like to know. thanks :D