“Henry Hugglemonster,” a new animated series about a family of fun-loving monsters, will premiere MONDAY, APRIL 15 (5:00 p.m., ET/PT) on the 24-hour Disney Junior channel in the U.S. Based on the book series “I’m a Happy Hugglewug” by award-winning children’s book author/illustrator and Ireland’s Children’s Laureate, Niamh Sharkey, “Henry