Vishnumaya Kuttichathan is the son of Goddess Parvati and Shiva and he was part of the history and folklore in North Kerala. There are many stories regarding the origin of Vishnumaya Kuttichathan. This particular story is based on the Theyyam performing art form of Kerala.
As per this story, Shiva once went to hunt in a forest and here He met a woman named Koolivaka. Shiva was enamored by the voice and beauty of Koolivaka and wanted to marry her.
Koolivaka prayed to Goddess Parvati to find a solution. Goddess Parvati appeared before her and told her that she need not worry about the situation. Goddess Parvati told Koolivaka that in her previous birth she was a Her maiden. She was cursed by Goddess Parvati to be born on earth for secretly breastfeeding Bala Ganapathi (child Ganesha.) When Koolivaka asked for forgiveness, Goddess Parvati consoled her by stating that in her next birth on earth she will have the fortune of breastfeeding the children of Shiva.
Goddess Parvati then asked Koolivaka to go to her house without any fear and expect for a change in her life. Parvati Devi then took the form of Koolivaka and approached Shiva.
It is said that as a result of this divine union Goddess Parvati gave birth to 316 children. These children were known as Chathanmar or Kuttichathan.
The youngest among these 316 children was Vishnumaya Kuttichathan. Goddess Parvati gave a buffalo to Vishnumaya Chathan as his vahana or vehicle. He was given to Koolivaka and they grew up under the guidance and protection of her.Shiva and Goddess Parvati blessed the children with many powers and most powerful among it was of changing forms.
Once, Vishnumaya Chathan went to Kailash to see his parents. But Nandi did not allow him to enter Kailash. He then took the form of Bhagavan Vishnu and entered Kailash and had darshan of Shiva and Goddess Parvati. Impressed with the power of his son, Shiva named him Vishnumaya.
Vishnumaya Kuttichathan is believed to help in finding treasure and also defeating enemies. He is worshipped to get prosperity and for desire fulfillment.