I don't think we were able to get the asset for a pogo animation last I had the chance to playtest it, but you hold down and melee for pogo. There's a decent amount of room before you make contact with the enemy to do it, similar to Hollow Knight.
I see, I was able to do it now. Having a proper animation and some explanation text would go a long way there I think! 'Pogo' probably doesn't mean much to people to don't know about 'pogo skip'!
