If you're looking for manga similar to Teikou Penguin, you might like these titles.
Tarepanda lives a happy and carefree life, but sometimes he needs to get out and go on a grand adventure. Rolling his way around the streets and down stairwells, Tarepanda finds himself in a variety of fun and interesting situations. Whether it's breaking bread with construction workers, lounging on a park bench, riding the train or becoming the subject of a painting, Tarepanda always manages to have a good time!
A comedic manga series about a penguin named Beckham Kinoshita who attends Kirikabu Elementary School and likes to eat hamburgers and hot chips.
Three penguins who got into the human society. Work part-time for food delivery on a tricycle, or give up microphones to each other at karaoke. A loose manga about penguins who live at their own pace and humans who are swayed by them!!