i also have another tip - when wanting to get a cat like robocat or such, log out of the web version and log in on the mobile version. start going around the map until you've racked up 15 coins (1000 fishbones = 1 coin, it might be tedious but i genuinely did this once to get cloud king to help finish the guardians level - not to mention cloud king is 25 coins) and get robocat. level up robocat until they pass atleast 200 health, and then switch them with robocat. same with caticorn and angel neko, but caticorn is the more preferrable option, since angel neko is 20 coins.