Board Thread:Questions and Answers/@comment-34921698-20190301142122/@comment-44711281-20191224212248

I just watched the 2 underlab videos about mettaton,seems like his NEO form was the FIRST one he had,but alphys somehow convinced him to stop using it,as she would make an even better body for him.

Alphys states that mettaton's EX form is a wip,so his final form may be a mix of his box and NEO forms added on to his EX form.

It is unknown why alphys added weapons to mettaton but it might just be show props suck as the bombs may be fireworks or something.it could also be he was first built as a human-eradication robot which A:could be used to impress asgore by building a robot with a soul so she could get the job as royal scientist or B:help asgore get the human SOULs.

He could also be weak because alphys was so concentrated on the attack,she forgot to give him a high defense.

But if mettaton knew about THAT,he probably woud've used his box or EX form,so why did he use the NEO form?

That's the point,he probobly DIDN'T know.alphys had most likely lied to him.

Ths isn't the only time alphys has lied though,remember the amalgmates?

All in all this probobly explains everything you need to know.