1st off, Black Mamba costs 3000, 3000!!!!!!!!!!!!!!!!!!!!! THATS NOT 300 KIDS, THATS 3000!
2nd, Mario is 2000 coins and it's potions run out really fast. With enough soups, when they run out, bam, attack them and with enough skill and enough hits, they are dead. (if you are good enough)
3rd...