I only have 4 golden hammers, and I havn't used one, with only about 12 challenges to complete!
Though I'm tempted to use them on the 2 combo ones (10 with 1 charecter, 400 combined) since I suck at combos. Though if I can't use it on Boss Battles intense, I better warm up my Puff.
See Ya George.
"He did not die - He passed Away"
At least following a comedians own jokes makes his death easier.