Board Thread:Questions and Answers/@comment-7371650-20170111040224/@comment-27701762-20170111060450

Alright. Sooo..."being the bad guy" in Undertale is not necessary in the slightest. It is, of course, needed if you plan on playing the other major route of the game, which is the Genocide route, but for the rest of the game it isn't needed. You do also miss out on other Neutral endings, on pieces of dialogue, and so on, and so on, but if these things aren't important to you, then they again are not necessary.

So the simplest answer to your questions is "go fight Asgore at level 1, and it should take you anywhere between one and fifteen attempts depending on how much preparation you do and how good you are."

The fight, like all of the fights in Undertale, is about learning the attack patterns and how to deal with them. Once you've got that down, it's easy. If you bang your head against the wall a few times learning it, you'll eventually get through without issue. If you continue to have trouble, there are ways that you can prepare by acquiring certain items and grinding for the most powerful armor in the game.

Why not just play it, and play it the way you want to?