As you travel throughout a number of Kingdoms during your journey to rescue Peach, you may notice a certain hatted dog roaming around these given areas, the same that can help you dig up a Power Moon or two. But did you know that you can eventually have this dog join your team and travel with you on the Odyssey Airship?
In order to have this dog join your team, simply obtain 250 Power Moons and unlock The Dark Side of Moon Kingdom. After you do, this helpful pup will now be found in the corner of your ship. He will also appear inside the Odyssey Airship in any Kingdom where another dog isn't already found running around outside.