When Lupowl barks rapidly, the barking actually contains a secret code. Humans and certain Pokemon are capable of decoding it.
A Pokemon widely considered annoying due to being both hyperactive and noctural, its constant barking keeping sleepers up at night. However, a hidden code is within this barking.
A hyperactive Pokemon, it is usually barking and yipping. Combined with its nocturnal nature, it tends to annoy sleeping people and Pokemon.