Hot Bath Rock is the first stage in Volkanos Volcano.
Spam Tank Cat and Macho Cat and use Cats such as Valkyrie and Titan to do most of the damage. Do not use Bahamut, as unless you are very lucky the Camelle will knock it back before it can finish its attack. Artist Cat can solo this stage if you have him sufficiently leveled. Or if you have Gacha, use only crazed cat and Tesalan Pasalan Level 15+. Camelle is very easy, and if you do not have Crazed Cat and Tesalan Pasalan, just use a meatshield that can withstand two hits from Camelle and a long range cat.