Undertale (Pt 7): Neo Manages to Defeat Mettaton While Learning of Somebody's Betrayal

[MOSTLY BLIND LET'S PLAY] - SPOILERS IN THE DESCRIPTION! READ AT YOUR OWN RISK!

After Neosekken finishes his conversation with Sans, he moves on to the Core, where the strongest monsters Neo has encountered thus far appears - and actually manage to kill him a couple times, thus finally bringing Neo's winning streak to an end. On top of that, Dr. Alphys' advice to help Neo starts leading him into traps, a couple of which managed to hit Neo, although not killing him. Dr. Alphys acts surprised whenever her "information" on the Core is proven to be outdated and worthless, although her "surprise" is awfully transparent to Neo. Also, there's more puzzles for Neo to solve in order to open new pathways. Despite the tough monsters, the increasingly unhelpful advice, and more puzzles, Neo manages to reach the top of the Core - where Mettaton is waiting for him.

Neo then confirms his suspicions towards Dr. Alphys, revealing that Neo was being played for a fool in order to make Dr. Alphys feel better about herself - and instead of allowing her to come "save" Neo, Mettaton locks her out of the room and begins another battle with Neo. Dr. Alphys calls Neo over the phone and gives him advice on how to stop to Neo, and to the absolute lack of surprise of Neo it turns out that advice only ended up making his situation worse in a lot of ways by allowing Mettaton to transform into a new form.

Neo barely manages to come out on top in the end, managing to reach a peaceful end to the battle. Neo then presses forward, and on his way out of the Core Neo finds himself confronting a meek Dr. Alphys...