The flunkies from any Metal Gear game, definitely.

"!"

Any guard in any metal gear solid game that really has to go to the bathroom, but can't make it to said bathroom.

The turtles in mario, what can I say they were awesome.

The slimes in Dragon Quest 8, in fact most of the enemies in Dragon Quest 8, just because of their names (Dingalings). Same goes for Earthbound.

METTAURS! (aka Metools, Mettals, or just Metts)
They're just so CUTE. They're also annoying when they go hiding beneath their helmets - they're the classic "invincible unless attacking" enemy.

I find it utterly unbelieveable that no one has chosen Eggplant Wizards.

Wasn't that enemy made into a flunkie on that Captain Nintendo cartoon? Someone had to like it.

As for me, the Slimes in most RPG's. They are the visible forms of generic monsters that terrorize generic small villages until the generic hero shows up. You couldn't have a proper RPG without them.

What about Space Pirates from Metroid.

Darknuts from WW.

Dragon, Gald Dragon from ToS

Wizzrobe from MM (I don't know if mini-bosses count, but they occured more than once.)

Valuan Spellshis from SoA

Amen to that.

It still freaks me out whenever I get spotted by one of 'em and I don't know it. The sound that plays, it's heart-stopping...

Dodongos. If you're really patient, throw a bomb in their face instead of attacking them from behind: I was quite surprised to see it swallow the bomb, then exploding to bits( I always used to attack from behind with my sword).

Also, the Dark Knuckles in the Spirit Temple and Ganon's tower; there are only five of them in the whole game, but man the're fun!

Banjo-Kazooie: the mister Slushie(the snowball-throwing snowmen.)So fun to hammer them in the face while flying!

The dark nuts from WW: so fluid.

Hell, give me the goddamned Heartless ANY day!