If you're looking for anime similar to Pikupiku Sentarou Selection, you might like these titles.
Based on Usamaru, a creepy-cute cartoon rabbit character from a popular series of LINE stickers.
Matthew is a daydreaming worrywart of a rabbit. Matthew also has two friends: Keron, a pessimistic frog who is fond of good-luck charms; and Ham, a hamster of few words and who moves through life at his own pace. The story follows the three animals' everyday lives within a mysterious forest.