Undertale: Every Main Character Ranked Worst To Best
5. Mettaton
Mettaton flies higher on this list thanks to the fact that they provide you with two whole characters, both of which are a lot of fun. You face many adversaries in The Underground, but very few of them manage to charm you quite as much as this soul in a robotic body.
You're introduced to Mettaton through Alphys, as she designed the robot to be a TV personality - albeit with some accidental human killing fixations. This sense of flair and attention-seeking becomes an integral part of them, as you're put through the wringer through a quiz, a cooking show and even a news report.
Mettaton stands out easily for producing some of the most interesting moments in the Hotlands, but it only gets better once you partake in their boss battle. After flipping a switch on them, you're introduced to their true form, Mettaton Ex.
The character maintains all of their over-the-top charms but turns into something far more eye-catching and entertaining. After the intense battle, you even get to learn his origins as the brother of Napstablook, giving the character a meaningful backstory.
He easily ranks high thanks to his flashy design, great dialogue and vibrant personality.