Ok. Later today, I will be making the biggest update as of yet. Unfortunately, in order to do so, I must reveal the biggest surprise I wanted people to find out when Littleroot Tech Demo is released. So, once I insert the (new) rival sprites, I will be revealing the new rival.
However, I want people to speculate on who it is. Throughout the descriptions and videos, I have left subtle hints as to who it is. But remember- it's my hack and I want to add my own twists and turns, but don't worry- the original rivals will return later in the storyline.