skeleton brothers, Papyrus, older, Sans, younger, playful pose, blue hoodie, white t-shirt, black shorts, slippers, Papyrus, tall, red scarf, white battle body, blue pants, confident stance, humorous interaction, bone-themed powers, cartoon style, vibrant colors, dynamic duo, comic effect, exaggerated expressions, friendly rivalry, Undertale game, pixel art texture, 2D side-scrolling background, underground setting, torch-lit caverns, magical glyphs, humorous banter, action-packed scene, brotherly bond, video game fan art.