I'm a little short on time, but I'm going to do this, darn it.
661. Malagarrians. The Malagarrians exploited a high proportion of the resources of their homeworld, being rather advanced.
Then they turned their planet into a reactor, and it blew up.
Rating: 3/5. Yeah, that's amusing.
662. Malarians. The Malarians don't appear to have anything to do with tropical diseases; instead, they're a member of the Malarian Alliance, which apparently also had the Ansionians, who are boring and annoying guys who apparently donkey laugh (if I recall correctly) as members.
Funny that the Ansionians are considerably better known and actually, y'know, have pictures of them, while the members that the alliance is named for are almost completely unknown.
Rating: 2/5. I've got nothin' to say. (Actually, I'm probably going to skip commenting much on the ratings unless I've got something particular to say, because I'm in a hurry.)
663. Mallif. The Mallif are descended from another race. They have a weird religion that they like to share with others. In the event of some form of need, they have access to an old, old fortress, which has cryogenically preserved warriors of their ancestral race waiting to be awakened.
That's... kinda cool.
Rating: 3/5. Quirky.
664. Maltorrans. Stocky. Oddly jointed limbs.
Rating: 1/5. Boring.
665. Mandallian Giants. They're bigger than Wookiees, and look really awesome.
This didn't keep Chewbacca from trouncing a Mandallian bouncer, though.
Rating: 3/5. They look cool.
666. Manikons. The Manikons, despite their ominous entry number, are unfortunate primitives who became alleyway savages on Coruscant somehow after some form of civil war (whether their own or someone else's is unclear) rendered their world uninhabitable. They're quadrupedal but can stand on two legs, and also have some kind of blinding, stinging venomous spray.
Pretty handy when you're a troglodytic inhabitant of Coruscant's gigantic and rather terrifying underworld, really.
Rating: 3/5. I wish there were pictures.
667. Mannovans. Apparently gray-furred, they are described as "sardonic" and "apparently unruffled" by the fact that their planet is now a polluted cesspool of general nastiness.
Rating: 2/5. It wouldn't take much to make that a 3/5.
668. Mantellian Savrips. Mantellian Savrips are rather huge and burly-armed creatures who are mistaken by most for particularly cunning animals, to the point where they're hunted as pests and even raised for their apparently savory meat (uh, yikes-although that didn't pan out). Their lack of technology and the bum deal they've been handed (which led to their population being pretty low) don't keep them from being clever or awesome. The big, scary piece that we see growling triumphantly after Artoo used it in the holochess game that he and Chewbacca were playing was a Savrip, incidentally.
Anyway, things got even worse when their homeworld was invaded by the Yuuzhan Vong ([expletive deleted] Yuuzhan Vong), but they still survived, because a hundred-plus years later, there was a Mantellian Savrip Sith.
Rating: 5/5. The Mantellian Savrips are a little obscure, but very cool-looking and with compelling backstory. I like 'em. (They may have gotten a pity point for the fact that, even outside of the movies' universe, they tend to get treated as unintelligent animals.)
669. Mantilorrians. Apparently some were "rat-catchers," and their expertise was called upon when the Kowakian monkey-lizard Salacious B. Crumb was loose on a space station causing trouble.
Rating: 2/5. Eh, I dunno.
670. Maoi. The Maoi are some kind of strange species from the Kathol sector, which is (as I've mentioned often) the epicenter of Lovecraftian things in the entirety of the Star Wars galaxy. They were banished to inhospitable places by the DarkStryder, but survived, apparently through sheer cussedness. They had access to the Ta-Ree life energy (a Kathol sector twist on the Force) and used it to immobilize prey while they forced themselves into mouths and down throats so that they could digest the prey from the inside.
Rating: 3/5. Yeah, that's pretty entertaining, though obviously also disturbing.