This is a friendly sparring match between you and Papyrus. You are in Blue Mode. If you are on FIGHT, press Z to attack. Find out the rest... FOR YOURSELF.
Thanks to @SteveTheNarwhal for a few sprites. Go check out his Undertale: Not Entirely A Bullet Hell Battle Engine at https://scratch.mit.edu/projects/92497432/#player! This engine is free use. It was made for Photoshop Flowey-style battles. It also includes a pre-made fight with Papyrus and 6 built-in attacks to give you an idea of what it's like. There is an empty edition. https://scratch.mit.edu/projects/113616367/#player
