Community Items

My questions are simple.
How can I make a concept for an item in-game, like the community ones?
And if I do it, can I just make a concept and not the real pixelated thing? Im not good at pixel art so I dont have any chance, what about sketches?

The community items are commonly picked from Item Design Contests. However, the developers are always accepting ideas from the players.

You can always submit the concept idea of your item. It doesn’t necessarily has to be a pixel art, and if the developers like it, it might come into the game with some changes.

It’s basically your idea so you think it up.

That’s possible, devs would just take the concept you’ve submitted and turn it into an item in game
If you will be submitting your ideas you can post it in the Game suggestions category