Friends in Strange PlacesG 20

Completing the Underpants Gnomes' side quest will unlock them as a friend, and the Crab People can be friended once you've unlocked the Nagasaki fart by going into the sewer from next to the movie theater and travelling left a short distance. Blow up the rock with the glowing green cracks (with Nagasaki), talk to the Crab Person, and they will friend you.