Backpacky is an S-grade Pet. It burps out a large wave of Jellies and Power Jellies at certain intervals. The wave may destroy obstacles.
However, it is not a good Pet for scoring points, as the Jellies it produces are not worth many points (being regular Jellies such as Bear Jellies or Alphabet Jellies), and are burped in a fan shape spanning the whole screen, such that the player is unable to collect all the Jellies without a strong Magnetic Aura. Worst of all, the Pet only has one combi bonus with its combo cookie, Adventurer Cookie, who is mainly used to collect Mystery Boxes - a task in which Backpacky would be no aid to.