why would he do that?
a barren stretch called Deccan plateau?
why would he leave the lush green forests and great places of south India for central India?
People here are proposing a hypothetical war between Babur and Krishnadev Narayan. How it would have been possible without the latter not moving his troops to attack Babur? Babur's policy was to get control of that part of Hindustan that was ruled by Ibrahim Lodi. He was successful in this respect.
Since Babur was not after a land in South far away from his own dominion, he was not probably interested in that. In such a situation Krishnadev Narayan had to invade the north, which, I believe, was not possible for him.
In Delhi the Sultan changed from Ibrahim Lodi to Babur, but the Sultanate itself did not change. Babur would have been supported by the entire north had Krishnadev dared to attack north.
Rather, it would have been between two contending forces. Another point, Babur was a newcomer in 1526, but other Muslims of foreign origin were already in Hindustan after 1190 when Kutubuddin Ibek was coronated in Delhi. So, many of the then Indian Muslims would have supported Babur.