"Oust Congress and banish the darkness forever," the 86-year-old Sena patriarch said in a statement published in party mouthpiece 'Saamana' here.
Thackeray, who virtually announced retirement from public life in a video message at the annual Sena Dussehra rally in October, greeted people on Diwali.
"Overthrow the Congress governments in the state and at the Centre, which are a 'cancer'," he said. The Sena chief flayed Congress governments for ignoring crucial issues like rising inflation, electricity shortage, corruption and Indo-Pak relations.
"Union Home Minister Sushilkumar Shinde says all problems of the country would be solved by playing a cricket match with Pakistan," he said. The Sena chief had yesterday said he was ailing but not on ventilator. "I am feeling breathless but I am not on ventilator," he had said.