This very same thing happen to a (formerly) wild Drampa in my own copy of Moon.
Related to the artwork: No doubt that Marowak of all Pokémon would understand Munchlax's pain...
Munchlax called for help!But its help did not appear! Luxury Ball I have to catch it!But its help did not appear!7th attempt.After this there was lots of petting.Pokemon Sun/MoonI hope it calls a Happiny or Snorlax~