There is a new town that forces you into the old school 2d NES/SNES style graphics and it contains a bunch of quests (that are unlocked by finding these little guys in the main game world) that transport you to all the old DQ games for a few sidequests. Think there is like 25 in total or something. The premise is that the denizens of the new town are somehow connected to all the worlds and monitor them as a duty, and something is messing with the timelines and wrecking things in each world and you have to do some little tasks to fix everything. Its cool af, hits all the nostalgia buttons.