Make it far enough in Super Castlevania IV and you'll see this stage, affectionately known as 'the treasury' by some... well, by me anyway.
Along the way through the stage, you see these treasure chests pretty much everywhere.
What might not be immediately obvious is that each one contains a hidden porkchop, you just have to work real hard for it.
Pick any chest you like, and then jump on it 255 times. Yes, two hundred fifty five times. Then, a large pork chop will appear right over your head!
The problem is that it takes so much time to pull this off that you eat up a lot of time on the old clock, so you probably don't want to do it unless you're in the direst of straits. You also might consider not doing it on the chest that I did, you're probably going to want your food to appear in a place where you can actually collect it.