Q. Hi, Is there any need of 4X4 or 2X4 is enough - Pajero Sport?

It depends on your requirements and the environment in which you drive. For example I own land in Uttarakhand and often travel from Delhi. the PS in a 2X4 mode is superbly stable on the highways and is even better in a 4X4 mode in remote areas of Uttarakhand where there are no roads but dirt tracks only.

2X4 is sufficient most of the times, 4X4 provides extra assurance in difficult terrains.

Yes it does comes in automatic with paddle shift.