Keroro Land is a spin-off shōnen manga magazine of the popular manga and anime series Sgt. Frog. The first characters originating from Keroro Land, the Shurara Corps, have appeared in the anime.
Story
Keroro Land is a children's magazine that is focused on the anime and manga series Sgt. Frog. The magazines contain games, previews of future episodes, advertisements for merchandise, and even a section of yonkoma comics drawn by several well-known dōjinshi artists. The magazine also contains a section where children can send in drawings of their own Keronian creations and the winning entries are drawn by Mine Yoshizaki. Although it is unknown what the winning entries were going to be used for, a card game entitled Anokoro Keroro Gunso was created where some of the winning Keronian designs were used as characters. Some of these characters also made it into the Anime series.
The card game is a prequel that revolves around the original Keroro Platoon's first real mission. Keroro, Giroro, Zeroro, Firuru and Zoruru form their own teams and split up to fight for the Keron Star, eventually facing the Black Stars, a team bent on conquering Keron. There were three collections of cards released, each one divided in "seasons".
Anokoro Keroro Gunso Characters
1st season
Keroro: The main character of the series. His helmet is gray and his yellow star has red traces. Starting in the "second season", the second batch of cards, his primary vehicle is the AKR-SP, a hover bike.
Giroro: Second in command of the Keroro Platoon. He wears a red jungle camo helmet and lacks his scar and weapon belt. His skull symbol is also on his stomach. Starting in the "second season", the second batch of cards, his vehicle is the Type G66, a small red tank.
Team Giroro / T.A.S.T.
Aruru: A nurse Keronian.
Mukaka: A short-tempered Keronian.
Hanana: A flower Keronian.
Eruru: A designer of the Keronian army.
Zeroro: Dororo during his assassin status. Starting in the "second season", the second batch of cards, his form of transportation is the Falcon, a glider in the form of a shuriken.
Firuru: A soccer-loving Keronian with a bandanna and a band-aid on his nose.
Team Firuru / Sporty
Piroro: A red and black Keronian clown.
Metoto: A dark blue Football-loving Keronian
Besusu: A gray Baseball-loving Keronian
Pokaka: A light brown Keronian boxer
556: A human-looking alien wearing a futuristic helmet, a torn school uniform and a metallic sword, resembling a gang member.
Team 556 / Metal Souls
Lavie: 556's sister. No different from her future self.
Mahaha: A black Keronian with a hover bike.
Putata: A yellow Keronian painter. Future Shurara Corps member.
Gitata: A yellow Keronian guitarist.
Madodo: A mad scientist. Creator of the Robobo robots.
Team Madodo / Mad Mechanics
Robobo M: A Robobo with magnets for hands and feet.
Robobo E: A Robobo with electric outlets for hands and feet. It has to be recharged and uses a lot of energy.
Robobo D: A Robobo with drills for hands and feet.
Robobo P: A Robobo with propellers for hands and feet.
Metata: A Keronian cyborg. Starting in the second season, he uses a hover board called Ω. He's the leader of the villainous group Blac Stars. When out of battle, initially they all wear white clothes covering their entire body, with a black star emblem on their chest.
Mahaha: A red hover biker. Initially 556's ally, but eventually reveals his true identity and appearance (his name changes to a Kanji spelling and his color to red) and joins the Black Stars.
3rd season
Corporal Garuru: Keronian army member.
Major Kururu: A young Keronian, but already a high-ranking officer. Built a living Nuii doll.
Tamama: A young Keronian who still hadn't joined the army. He had a light blue cap.
Metata: Starting in the second season, he uses a hover board called Ω.
Mahaha: A red hover biker. Initially 556's ally, but eventually reveals his true identity and appearance (his name changes to a Kanji spelling and his color to red) and joins the Black Stars.
Kagege: Another Keronian assassin, leading a team of monsters.
Kagege Platoon
Mekeke: A Keronian puppeteer able to control other Keronians.
Yukiki: A snowman Keronian.
Ushishi: A tribal Keronian with horns.
Takoko: An octopus Keronian.
List of Keroro Land Keronians
The following is a list of every Keronian featured in Keroro Land. Some went on to appear in the Keroro anime. But the rest of the Keronians never appeared in any official story or manga. Each Keroro Land volume has 3 new featured Keronians, but sometimes 4 in each.
Winter Edition
Saruru: A monkey Keronian. Appears in Anokoro Keroro Gunso.
Aruru: A blue Keronian nurse. Appears in Anokoro Keroro Gunso.
Gururu: A Keronian sheriff.
Summer Edition
Geruru: A liquid Keronian. Renamed to Giruru, appears in the Keroro anime episodes 159, 169 and 177.
Hanana: A flower loving Keronian. She has pink skin and her tail resembles a leaf.
Robobo: A robotic Keronian. Appeared in the anime, episode 185, and several variations were in Anokoro Keroro Gunso.
Volume 1
Gororo: An electric oni Keronian.
Eruru: A designer of the Keronian army.
Goruru: A golem Keronian.
Volume 2
Merara: A Keronian with fire powers. Red with a black eyepatch.
Dokuku: A gas Keronian. Appeared in episodes 159 and 177 of the anime as Giruru's brother.
Rirara: A Keronian kunoichi.
Volume 3
Metata: A Keronian cyborg. Main antagonist in Anokoro Keroro Gunso.
Samama: A Keronian Natsumi. Her mark is a stylized yellow "N".
Oyoyo: A Keronian swimmer.
Volume 4
Nyonyo: A Keronian Nyororo. An experiment of the Keronian army.
Piroro: A Keronian clown.
Nuii: A doll Keronian. Appeared in episodes 159 and 188 of the anime.
Volume 5
Firuru: A Keronian soccer player.
Putata: A Keronian crazy artist. Appeared in episodes 159 and 161 of the anime.
Toriri: An owl Keronian.
Volume 6
Gitata: A Keronian guitarist.
Mahaha: A Keronian hover biker.
Mukaka: A young and short tempered Keronian.
Volume 7
Foruru: A Keronian cyborg with a human appearance. His story is based on Kamen Rider.
Shisusu: A female Keronian witch. Foruru's helper.
Shurara: A Keronian knight. Appeared in episodes 159, 202 and 203 of the Keroro anime.
Volume 8
Gyororo: A Keronian with multiple eyes around his body. Appeared in episodes 159, 161 and 188.