Imp Poes are a specific kind of Poe found exclusively in Twilight Princess.
Also, there are three
Imp Poes in this cavern, allowing Link to collect three of the 60 Poe Souls found in the game.
Unlike Poes in other games,
Imp Poes can only be fought when Link is in his wolf form and using his senses.
Twilight Princess Poes are called
Imp Poes and might seem more creepy.
Even my son, who at the time was too scared of
the Imp Poes to play the game has recently played through the Wii version.