Hawlucha is mostly fine in my opinion, but does it get Ice Punch or something like that? Hawlucha really needs a way to activate Unburden, hence why it runs Substitute so as to bring its HP into range where its item would be used up. So I really do not think Hawlucha needs an update, except....Chesnaught and Hawlucha need updates and there is stil debate on diggersby.
Were Gems released in ORAS? If Gems are released, that means that Flying Gem was released, which definitely needs to be mentioned if it exists in ORAS (Flying Gem + Acrobatics = free Hawlucha).