ANNOUNCEMENT: The Custom Block Shop is closed. This is so that I have a bit more time to make projects, art, or improve the Scratch Wiki. :) CAA14 had asked me to take over the Custom Block Shop, so here it is! Just look inside! Your order will be marked with a comment in the sprite of the member that made it. Order now! Remember: A custom block is just a script that's grouped into a "mascot" block. It represents the other blocks, just like a mascot. They can be used to make scripts smaller, and they can take some inputs. For example, a block that says "Make clone of myself at X (x) Y (y)" needs two numbers in it. Although this is a very simple, it's nice because it shows some example inputs.
Custom Block has closed But I will fix soon.