Delfino Oak Tree

Delfino Oak Trees are a species of trees. Though their name suggests a connection to Isle Delfino, they only appear within the Mario Kart: Double Dash!! iteration of Mario Circuit, which also appears in Mario Kart Wii as a retro course (this course also contains Princess Peach's Castle, which is in the Mushroom Kingdom and nowhere near Isle Delfino). The majority of them appear on the outskirts of the course, watching the race, but a couple of them appear on the racetrack itself. If a racer bumps into them, they immediately come to a stop. All of them gently bob and sway while remaining firmly planted.

They are also prominently featured in a K'NEX building set.