question 1:the number on the machine has to be the last three digits in your gold amount the locations are 777: Garden of madness with the 777 robe 666: under the wizardry lab with the gold ring 573: the cursed clock tower with the shamen ring
Question 2: yes just kill them more than once (except flying humanoid)
the yeti is in the first room and you have to lure him out with the waiter skelaton soul
the flying humanoid is in the room before zypher and kill him with the mandragora soul
please post in the Q&A forum with any questions
castlevania+mario kart= 2 best game ever