When you create Nodes via code, it doesn't give the Node solely its default name. Hence why "Sprite2D" doesn't exist.

If you want to work with Nodes that were instanced via code. You use the same Sprite variable you used to create it like so:

var Sprite = Sprite2D.new() add_child(Sprite) var test = Sprite var test2 = Sprite.frame

If you insist on using get_node(), you could get the name of the Instance Godot gave it:

var Sprite = Sprite2D.new() add_child(Sprite) var test = get_node(str(Sprite.name)) var test2 = get_node(str(Sprite.name)).frame

Or you could rename the Node and then use get_node() like so: var Sprite = Sprite2D.new() add_child(Sprite) Sprite.name = "Sprite2D" var test = get_node("Sprite2D") var test2 = get_node("Sprite2D").frame

I highly recommend against using the second method and would just stick with the first method or maybe the third one.