Hello @The_Clean_Bandit !
What you need is a “Unlit” shader, a shader that doesn’t be affected by any light property.
Create a new material, select the “Result Material Node” (The big one on the right)
And in “Shading Model” change from “Default Lit” to “Unlit”
When doing so, look that the “Base Color” option is disabled. (and a lot of others)
Connect your color node (or texture in case of using one) to the “Emissive Color”
Now the object will have a unlit shader, but, as you can see here it’s still generating shadows.
The ability to cast shadows from an asset can be set in the object Details Panel.
Click the asset in the scene, and in the Details Panel look for Lighting tab and uncheck “Cast Shadows” option.
I hope this helps you!