lol okay I was being stupid I compltly forgot the air dandy has two hits.
I was having the opponent high jump then I jumped under them and hit them with the tail and they blocked it. Then I tried jumping and pressuring them with jp then I'd hit airdany and it's unblockable unless fd, but that was because I was hitting with the head whereas before I was hitting with the tail...so tail blockable and head unbloclable without fd.