Some are new, others have been around. If you want to add some, do what you will. What is an error? An Error is a recolored version of unused OCs, or an OC that isn't used very frequently. Their sole purpose is to rapidly grow their territories and army at all costs. The strength of an individual may vary. How do you make an error? Dig in your backpack to find old or unused OCs. Some "guidelines" for errors: 1. Most shapes have red outlines (If the character isn't entirely corrupt, you might want to keep a few parts pure). 2. Most shapes have an inner black color. Some might be entirely red (EX: Pupils, buttons. Again, if the OC isn't entirely corrupt, leave the pure parts the same). 3. Some modifications to shapes, if any. This makes the error TERRIFYING (EX: reshaping some shapes to add spikes. Still, if your OC isn't 100% corrupt, leave some parts pure).
All Trap_Is_Awesome made some of them.