Yeah, so I wanna try making a Mettaton avatar on here but I have no idea what items I should use and what would work best for him... anybody wanna help a poor soul here?

Are we going with his EX form or the lovable box?

and could help in either case.

Ooh, I did not know about those Past Suit items! Maybe it's time for a redo of my version. (I can't seem to save a version without the zombie effects, so please ignore that!)

Here are two vital items I used in mine, keep in mind I didn't use a reference in the beginning but I think it came out pretty good.
Imperfect 404 Figurine
Pink Heart and Diamond Lingerie
Outfit Not Found I'm not sure if it will display correctly, but if it does, here's how mine came out at the point I gave up. I just couldn't find any decent shoulder pads and it was getting expensive, but I wish you luck in doing better!

I would suggest the following items for the hair. Good luck!