The hypocrite's the one that exists.
Tell him drinks are on the house.
Check their jeans.
Nobody has ever seen them directly, but everyone says they exist.
Omega!! Note: surely it already exists but I thought of it independently and am proud of my terrible joke!
because it doesn't have mushroom to talk.
None, they don't use light bulbs. They live in caves and use no forms of artificial energy because they wouldn't want to be perceived as hypocrites or morons.