The World Ends with You: Solo Remix Tips

Pig Noise
Pig Noise are a type of noise that shows up green while scanning, and they look like pigs. Defeating them can be a hassle, but they thankfully don't attack. Certain pigs require damage to be dealt only by certain pins, and some pigs need to be taken out in order. Try everything, and you should eventually figure out how to beat the pigs. They give really good drops.