>>55157315No. Even the nips are considering it because they call pseudo-legendaries "the 600 club" and Archaludon does have the 600 BST that they used as name for the group, but the official name of them is "the late-bloomers", which obviously references how long it takes to evolve them.
Duraludon not only needs only one evo to reach full maturity, it can do it level 1, so it's clearly not a late bloomer and thus not part of the same group as Dragonite, Tyranitar, Metagross, etc