diglett->dugtrio
magnemite->magneton
beldum->metang->metagross (kind of)
klink->klang->klinklang
honedge->doublade

(compiled from a quick skim of this list)

I guess they haven't really played out the "tape unevolved pokemon to get the evolved form" trope quite yet. and what's better than one ghost sword? two ghost swords, obviously.

could be ok since sword implies high attack. we'll see