That is hard to say, however frogs are generally appealed as "cute" in Japanese anime (just look at Japanese keychains) so that is probably why.
Images of Keroro Gunso can be found on sites which feature Japanese animated characters. Keroro Gunso is a type of animation called manga and is part of a series. In Japan Keroro Gunso is first known as Sargent Frog.
There is not a dubbed version of any of the Keroro Gunso Movies yet or there wont be but there isnt any signs that there will u could try funimation they dub keroro gunso but there it is sgt. frog
Yes, Keropla are Japanese Gundam-based models for the popular show Keroro Gunso, in English, Sergeant Frog.
The name "Keroro" comes from the Japanese impression of the sound a frog makes, which is "kerokero."
Sergeant Keroro
Sgt. Frog, or Keroro Gunso in the original Japanese, is a humorous manga about a brother and a sister who come upon a froglike alien who was hiding inside the brother's bedroom. The brother is and occult fanatic and the sister is like the "golden child," with the perfect grades, figure, and sports ability. The mother of these two children is a manga editor, and she absolutely adores Keroro, the frog alien. It's pretty much about how that frog and its comrades try to invade Earth while their hosts, the children and mother from before, are housing them and trying to keep them from succeeding. It's also just a bunch of random, hysterical nonsense condensed into a graphic novel.
The manga is actually called Sgt. Frog and I know for a fact that Barnes and Nobles has it.
From what I can find Cartoon Network did air Sgt Frog, but only in Spain.
Keroro, Tamama, Giroro, Kululu and Dororo are the names of the five frogs in the A.R.M.P.I.T. platoon
Sgt. Frog is a Japanese manga series written and illustrated by Mine Yoshizaki. It follows the misadventures of a group of alien frogs trying to take over the Earth, only to be thwarted by a young boy named Fuyuki and his friends. The series is known for its humor and quirky characters.
none know for sure, it could be that mr. mine likes frogs, it could be because he is easy to draw, some even say it was because of a japenese song about a frog alian invadeing, im not sure for a fact
Keroro Gunsou is an anime which is pretty funny (in my opinion) and is about aliens ordered to take over Earth (which they call Pekopon); but they slack off and instead they do scams and pranks to the humans. When they arrive though each Keronian (that is what they are) confronts humans such as Natsumi Hinata, Fuyuki Hinata, Aki Hinata,Grandmother Hinata, Saburo, Momoka Nishizawa,and Koyuki Azamaya.The Keronians are Sergeant Keroro (the leader) Private Second Class Tamama (the storm trooper) Corporal Giroro (the mobile gunner) Sergeant Major Kururu (the tactics and intelligence officer) and Lance Corporal Dororo (the assassin). In the the series though they pronounce Sergeant as Gunsou, Second Class Private as Nitohei, Corporal as Goucho,Sergeant Major as Sochou, and Lance Corporal as Heichou. Also the King Of Terror comes and makes her debut as the Sergeants niece (for she calls the sergeant uncle). Her real name is Angol=Moa. The general storyline evolves around Keroro's insane tactics to try to invade Pekopon. This ranges from Keroro opening up a store that sells beautiful smiles for five dollars to creating giant mechanized robot's to destroy the city. There are also many other characters too, like Kogoro, Lavie, Garuru, Taruru, Zoruru, Tororo, Pururu, Karara, Sumomo, Shurara, and Dark-Keroro just to name a few. Currently the show is up to season five. Also keroro guso is tranlated in engilsh as sgt. frog