Mega Altaria
☆~Shiny hunter▢~
I did suspect it to be a Poison-type move but then because Toxic is the only move Poipole learns that poisons it may as well have been Toxic. I'm just waiting for that name or 'Dokudoku' to be called out at some point, hopefully in this episode.To be fair just because a move a pokemon has used is unnamed doesn't mean it's not a move because of the fact that we have had instances before where a pokemon used a attack but we didn't find out the name of the attack it was using until later for instance with Jessie's Mimikyu we saw it use Wood Hammer in episode 3 but we didn't none of the characters mentioned what move that attack was until epsiode 25, heck with Kiawe's Turtonator we saw it use Shell Trap in episode 1 but none of the characters mentioned that it had that move until episode 34 and then with Kiawe's Alolan Marowak use Flare Blitz in episode 34 but it wasn't mention what attack it was until episode episode 53.
So just because Poipole used an unnamed attack doesn't mean that it's not a attack, heck I think some was has mentioned it before that when comparing the attack animation Poipole used and what it does to the attack animations of existing attacks that it's actually matches up with the animation of the movie Toxic, so there is a good chance that the attack that Poipole used in epsiode 67 was Toxic,
heck it's probably actually pretty likely that the attack was Toxic when you consider the fact that Poipole thought Rowlet was attacking it so would make sense that it would use an attack to defend itself and if you consider that the attack poison Rowlet and if you compare it to the known animation the attack Toxic which was used by Team Skull's pokemon in episode 24 you would see that the attack animation matches up with the attack that Poipole used.