Green flag. In automatic mode, the outline will automatically morph from one Scratch character to another random Scratch character. Press <S> key to toggle Show mode. This shows the characters on top of their outlines between morphs. Press <Space> to toggle manual mode. Then you can choose the next character using the number keys: 1 - Scratch Cat 2 - Gobo 3 - Tera 4 - Pico 5 - Nano 6 - Giga
Huge thanks to @SBissay who wrote the morphing code in his project "Morphing Shapes" https://scratch.mit.edu/projects/207620935/ I looked at how it worked then created the Scratch Character outlines and added them.