If you're looking for manga similar to Kero Kero Keroppi: Hasunoue Town Kiki Ippatsu!, you might like these titles.
Oh no! Milk has disappeared through a mysterious door and only Cinnamoroll can save him! Will he find the courage to help his friend and still make it back to Café Cinnamon in time for tea?
Vintage 70's manga from Yasumi Yoshizawa follows a young middle schooler named Hiroshi. He's running around one day, when he accidentally slips and squashes a wide-eyed frog onto his shirt. To his surprise, Pyonkichi the frog is still alive and can speak to him! It's time for some fun adventures for Hiroshi and Pyonkichi!
The story follows Marlin, a clown fish, who is highly overprotective of his son, Nemo. When Nemo gets caught by a diver and ends up in a dentist’s fish tank, Marlin stops at nothing to find him and gets a little help along the way from a blue tang named Dory.
When the Twolegs destroy the warrior Clans' forest home, ThunderClan deputy Graystripe is captured trying to help his comrades escape! Trapped in the pampered life of a kittypet, Graystripe gets all the food and shelter he needs from his affectionate Twoleg family—but the forest is calling him. When he makes friends with a feisty kittypet named Millie, she encourages him to go in search of his lost friends. But will Graystripe ever find his way back to the Clan?