For the fans of the Anime, you would think this is (barely) safe for kids. Wrong. Keroro Gunso was previously a manga series for college students and up, so the content is much stronger than the TV show. This makes way for a lot more outstanding jokes as it always pushes boundaries it really should not do. To have these cute characters in horrible situations is the best thing they have ever done. The manga could be compared to Ebichu because of the strong animal cruelty from Natsumi and black comedy.
Story 8/10
There really isn't any story in this show. Five frogs have been sent to Earth (Pokopen, censored to Pekopon in the Anime because of racist reasons against the Chinese) and have the mission of conquering the planet, which they never manage to do. There is a lot of small one-chapter episodes though, which are always a joy to read. The story never touch any boring topics, does satire and really does not know what "too far" is.
Characters 10/10
You will love every main character in the show, the five frogs including their house keepers. Every character has some chapters dedicated to them. They are unique, fun and full of expressions. You will most likely notice their absence in the start of the manga, the show really is not what it is without everyone. Keroro the fast and quircky main character, Giroro the weapon maniac, Tamama the gay, Kururu the Otaku/Pedophile and Dororo the lonely Ninja.
The character who really stands out, Kururu, really shines in the manga. He appears nowhere as twisted, crude and sadomasochistic in the Anime as he does here. He has shower footage of everyone living in the Hinata house (thanks to his hidden cameras), causes strong pain for every character in the manga and even sells his hidden footage through the net. He trolls everyone and has no conscience at all.
Art 8/10
The art is pretty much simplistic, but Mine Yoshizaki has a lot of room to show his artistic skills. I am talking about the facial expressions I mentioned earlier. Every time the characters sees something shocking or disturbing, their faces turn into a whole lot of mess. These expressions are awfully detailed to make the frogs ook the ugliest possible. From the cute frog style to this grose, scary face like right from a horror movie, you must see it to believe it.
Enjoyment 10/10
If you thought Gintama was taking everything too far, you know nothing yet. The manga is full of fanservice, as well as Natsumis daily frog abuse. There will be blood, which there is, and is always fast-paced with no moral at all (unlike the Anime). The manga never seems to get old, not even at volume 22. It keeps getting better and better, with new ideas for every chapter. There is a bunch of parodies and pop-culture references as well. The only parts I will complain about is the chapters based after the second Keroro movie. Really unecessary if you have already watched it, as it's completely the same, only a bit more fanservey.
Overall 10/10
I have never enjoyed any manga as much as this. The manga keeps staying fresh (unlike the show) and does everything it needs to do to keep the readers attention. It's full of jokes, as well as some rare dramatic chapters, which is surprisingly well done and manages to shed tears. For fans of this author, there is also some crossovers chapters from his previous manga series and doujinshi. The facial expressions is once again the highlight.
I would recommend this to every Anime fan with a sense of humor. It's smart and stupid at the same time and pokes fun at every mainstream anime/manga out there, mostly itself. Breaking the Fourth Wall is no problem for this manga either. I would only tell you to look another way if you have a weak heart for blood, as there is quite a lot. However, it is only used in humorous situations.
