So on the topic of weapons not repped in Smash, what kinds of weapons are not yet repped in the fighter roster? We have swords, greatswords, grappling hooks, wands, pistols, cannons, hammers, buzzsaws, chainsaws (well, in sword form), drills, shields, bows, bombs/grenades, boomerangs, daggers, rocket hammers, laser/plasma blasters, missile launchers, clubs (including baseball bats), double-ended swords (though the only ones we have can turn into bows and a dual-wielded set of two separated swords), staves (though not quarterstaves), rifles, lightsabers, land mines, shuriken/chakram (and other similar weapons like sawblades), gattling/machine guns (at least as a function of the Mii Gunner's cannon), glaives, axes (including ones that are practically used like tomahawks), whip-swords, flails, bayonets (well, a bird used like a bayonet),and pick axes in the playable roster.
As for weapons not part of the roster, we have vibroblades (used by the Gray Fox), throwing knives (used by Ghirahim), railguns (mounted on Metal Gear REX, which sometimes appears on Shadow Moses Island), quarterstaves (used by Krystal), scythes (Death's Scythe), lances (used by Mii Swordfighters wearing Arthur's armor), and claws (used by Metal Face).
What weapons do we not have yet? We don't have fans, normal spears (unless you count Krystal's staff as such), crossbows, maces, or normal whips (as in whips that aren't flails or whipswords). I also don't think we have darts, either.