(This is my first review, I don't know what I'm doing!)

Aachi & Ssipak is an adult-themed South Korean movie released in 2006. The basic backstory is that in the future, poop has become the only source of energy. All citizens have microchips installed in their anus which monitors how often they poop, and everyone is awarded 1 "JuicyBar" for each log they drop. The JuicyBars are extremely addictive, and so a black market of crime and gang violence has formed around trying to amass the JuicyBars for profit. The most prevalent gang is known as the "Diaper Gang", which is comprised of little blue mutant freaks who steal JuicyBars with their overwhelming numbers.

Several years after it's original release, it was rewritten and dubbed for English speaking audiences.
I normally watch subs, but on a bit of a whim I decided to watch the dub and I'm glad I did.

This review will be based on the dubbed version, since the subbed version is quite a different experience.
(I will be comparing the two versions to each other, but keep in mind I only skimmed through the sub so take anything I say about it with a small grain of salt)

Why is it such a different experience? Well to start, although the show follows the same general plot between both versions, the commentary and interactions in the sub are extremely unserious. It's kind of like a less extreme version of the infamous Ghost Stories.

One example of the different commentary between the versions:
minor spoiler

Spoiler, click to view

Original: Person A: "If you bring me the scientist who created Geko, I will dispose of the Chief." Person B: "And I want the number two position in your gang." A: "It's yours. But if you're thinking of betraying us or plan to do something stupid, then you'll suffer a pain worse than death." B: "If you don't kill the chief, she'll kill me first. You can rest assured that I'll never betray you. I'll be ready for you tonight."

English dub:
A: "If you bring me the scientist who created your cyborg, I'll kill the police chief."
B: "And I want a super awesome looking hang-glider."
A: "It's yours. But if you're planning on betraying me I will betray you first. And by betray, I mean 'murder the shit out of you'. That's how I betray people."
B: "That sounds terrible, I will never betray you! And I really can't wait for that hang-glider. I'll be ready for you tonight."

These sorts of jokes happen throughout the entire movie and while they don't all hit, I did find myself laughing at just how stupid some of them were. Whether you prefer the more serious (it's still really not very serious) tone of the original or the dumb comedy of the dub is very dependent on the viewer, but for me personally I think the jokes were the only thing keeping certain segments of the movie entertaining at all.

The other main difference between the two versions was the soundtrack. The original version has a somewhat more "traditional" soundtrack for what you might expect in a movie like this, using a variety of genres like rock or trip-hop for different scenes.
On the other hand, the dub uses almost exclusively heavy electronic and dubstep songs (example here). And man, even though it's kinda corny, exaggerated, and over the top, the action scenes genuinely kick ass when there's bass drops going on in the background.
One thing I noticed about both soundtracks is that it's very all or nothing; there's little to no background music in any of the non-action or montage scenes. I think the lack of music makes those scenes feel a bit slower and more empty, but it's not the end of the world.

The last difference between the versions worth mentioning is that the English version had some small segments cut, with the overall runtime being about 4 minutes shorter.
(Also, I don't know if this is just because of the site I watched it on, but the original was in a lower quality 4:3 ratio while the dub was 1080p at a 16:9 ratio)

So now that we're done looking at the differences between versions, how was the rest of the movie?!

ANIMATION:
THE ACTION SCENES HAVE NO BUSINESS GOING AS HARD AS THEY DO!!! They were the highlight of the whole show in my opinion. There were some incredibly creative visuals which made fantastic use of the animation medium, and paired with the thumping soundtrack of the dub, it made for some fantastic moments. If you read this review and end up deciding this movie isn't something you want to fully watch, I would highly recommend watching just the first 5 minutes of the dub.

Outside of the action scenes, the animation was really just okay. I wouldn't call it bad at all, especially for 2006, but there's only a handful scenes that really shine. It's also worth noting that if you're watching the dub, the lip-syncing of the characters is comically off. It was a bit jarring at first, but I got used to it eventually.

PLOT:
While I already went over the backstory of the world at the start of this review, the actual plot is that two turd burglars - Aachi & Ssipak - end up working together with a girl who receives hundreds or thousands of JuicyPops per poop instead of the regular 1. Because of this, they end up being hunted down by the Police Force, the Diaper Gang, as well as another smaller gang.
Because the dub was mostly just centered around comedy, and certain scenes (including the introduction to the story - why would they cut that??) were removed, it was occasionally hard to tell the reasons behind individual characters actions. That being said, the overarching plot was quite easy to follow, despite being more complex than you might expect for a show about poop.
Overall I'd say the plot was just okay. It gets the point across and really focuses a lot more on just being dumb fun as opposed to any greater character or story building. For this reason I won't be talking about any particular characters either - none of them were very deep beyond their assigned role. If you do want a version with a bit of a deeper plot and characters, maybe watch the sub instead.

CONCLUSION
Overall, this movie is relatively unknown and will probably remain that way for some time. The action scenes really carried the movie for me, with the parts in between feeling a bit lacking.
I was also pleasantly surprised by the humorous commentary. It reminded me a lot of MXC (Most Extreme Challenge) so if you've watched that show or other somewhat parody-type works like it, you'll probably enjoy the Dub version of this movie.
I definitely wouldn't recommend Aachi & Ssipak to everyone, but at the end of the day I enjoyed my time with it as a unique entry on this site that doesn't have much like it.

If you want to watch the ironic humour of a show like Ghost Stories combined with the action and stylizing of works like Dead Leaves or MFKZ, then give this one a go.