The Real Ghostbusters: Samhain or Sam Hain?

"One of the only recurring villains is Samhain. He first appears in the episode "When Halloween was Forever". In the episode, he is released from his captivity by two goblins on Halloween. Once set free, he sends his minions all over New York. His plan is to make Halloween an eternal night that will last forever all over the world. Just before the world falls under his evil reign, the Ghostbusters put a stop to him and his terror. He is placed within the ecto-containment unit where it is assumed that he would stay."

-Wikipedia

RISA

Risa - Also called Epsilon Ceti B II, located about ninety light-years from Earth, known for its beauty and relaxing tropical atmosphere. It is a world commonly sought by interstellar vacationers and starship crews on shore leave.^[34][35] The planet orbits several stars and its climate is controlled by a weather modification network, with the natural climate being extremely violent. Risians, especially the women, are extremely open and will freely share their planet, and even themselves, with vacationers; a practice known as "Jamaharon".^[36] Perhaps not coincidentally, the fun-loving planet's name is also the Spanish word for "laughter."

from Wikipedia