If you're looking for manga similar to Mr. Pen Pen, you might like these titles.
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!!
Lion, Lizard and Toucan and more wild animals are working together at this company. Forget about savanna or law of the jungle. Their work-life is cute, funny and tough. Just like yours. Short comedy stories for all who are working today!