Nimakroli Baba was a sadhu who was a worshipper of Hanuman and then Lord Rama. He established many temples across the country. He was born as Lakshmi Narayan Sharma in Akbarpur village, Faizabad District (now Ambedkar Nagar Uttar Pradesh, India), to a Brahmin family of Durga Prasad Sharma. Even though he was a married man with children he lived the life of a recluse who amassed massive following due to his chamatkar.
The most popular of his chamatkar was stopping a train when he was removed from the train for travelling without a ticket. When the train didn't move an inch the people requested Babaji to come inside the train. At that point Baba asked the railway officials to promise to create a railway station at Neeb Karori village where this incident took place and secondly to treat sadhus in a better manner. Due to this incident he got the name Neem Karori baba. His other names were Handi wale baba (he used to carry a handi to eat and drink during his meditative years), Chamatkari Baba, Talayya Baba and Tikona Baba (he used to meditate in a triangular reservoir).
Baba was known for his siddhi and chamatkar. Once he distributed 48 oranges among devotees from the original 8 oranges, once he converted Ganga jal into milk all these were example of his Annapurna Siddhi. He continued to spread the message of bhakti and seva across the country till his mahasamadhi in 1973.
Over the years he gained popularity for his chamatkars and foreigners from USA came to India, got inspired by the Baba changed theit names to Krishna Das, Bhagwan Das and Ram Das. These men were resposnsible for taking Baba’s teachings to the west develipikg books, songs and documentaries. Kainchi Dham became one of the revered places where Baba was venerated as a demi god. It is because of this mysticism manu celebrities came to his ashram even after his death to seek spiritual refuge which includes zuckerberg, steve jobs and Virat Kohli etc
And now after the massive success of Hanuman Ansh (even though many other films have been made on his life and in the books of Krishna Das and Bhagwan Das there are detailed description of his chamatkaars ) the followers of baba jas also increased multi fold.