[1.12.2] When to register an Entity?

[GloriousAlpaca]

Hello,

 

in what case should you register an entity or rather, what exactly does registering change ?
I have been using my entity without registering it just fine, the only thing that changed after registering it, is that there's now a spawn egg for it.
I do not want it to have a spawn egg however, so should I just not register it ?

Thank you!
 

[GloriousAlpaca]

Well I have already changed my Code so it is registered.
This is the Code in my Main Mod Class

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@Mod.EventHandler
	public void preInit(FMLPreInitializationEvent event) {
		System.out.println(NAME + " pre-initialization");
		proxy.registerEntityRenderer();
		InitEntities.registerEntities();
		MinecraftForge.EVENT_BUS.register(new EventHandler());
		PacketHandler.registerMessages(MODID);
		NetworkRegistry.INSTANCE.registerGuiHandler(this, new GuiHandler());
	}

 

and this is the InitEntities Class

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public class InitEntities {
	
	
	public static void registerEntities(){
		registerEntity("asteroid",EntityAsteroid.class,20,50,39423,39423);
	}
	
	private static void registerEntity(String name,Class<? extends Entity> entity, int id, int range, int color1, int color2) {
		EntityRegistry.registerModEntity(new ResourceLocation(LEER.MODID+":"+name),entity,name,id,LEER.instance,range,1,true,color1,color2);
		
	}
}

 

However if you say it doesn't work when I'm not registering it I'll leave my code as it is right now.
How would I then go about deleting the spawn egg (my entity is not a living entity)?

 

Thank you for your answer.

[GloriousAlpaca]

Thank you very much for your help, I'll try doing that.