This is how I register it
public static void registerEntity() {
createEntity(Caterpillar.class, "Caterpillar", 0x66FF00, 0x000000);
createEntity(Coyote.class, "Coyote", 0x5E0F0F, 0 );
createEntity(EntityGrenade.class, "Grenade");
createEntity(EntityPepperLightning.class, "Peppa Lightning");
createEntity(EntityPepperSpray.class, "Pepper Spray");
}//end registerEntity
public static void createEntity(Class entityClass, String entityName) {
int entityId = EntityRegistry.findGlobalUniqueEntityId();
EntityRegistry.registerModEntity(entityClass, entityName, entityId, MainRegistry.modInstance, 64, 1, true);
}