While I disagree with the guy saying there is no gameplay, I do also disagree with you in that it being the best part. As an RPG it is way too simple. As a game about dodging, it's great to see the first time, but it's ok every time after. If I wanted to play a simple RPG game involving dodging, I'd play the Mario & Luigi game. Because I also get more option with how I get to attack and how I dodge, (like trying to go for a counter attack or not). It is by no means a bad system, but as an rpg fan, there are so many better battle mechanics. Undertale was really meant to be for the story through and through.

Only thing I will argue is the point that it has no gameplay the fights we're pretty much the best part of the game and we're actually really well made, otherwise 100% accurate.