Double Rainbones refers to Souffle's fourth Sugar Rush Attack. Multi-colored bones appear horizontally across the area. They proceed to transform into groups of bullets that spread out in opposite directions.
- The name Double Rainbones is based on the viral video Double Rainbow.
- The bullets in this Sugar Rush Attack are actually not the colors of the rainbow, as the name implies. Instead of indigo, cyan was used.
- The bones are incorrectly ordered with blue before cyan. As the bones transform into bullets the colors return to the correct order of green, cyan, then blue.