As the Season Five My Little Pony episode "Hearthbreakers" turns five years old, I'm doing facts about Pinkie Pie's parents, as well as her oldest and youngest sisters, starting with Igneous Rock Pie:
* He is the third pony to have Terry Klassen as his voice actor, following Hoops (Young) and Cherry Fizzy (also from Season 1).
* He and Cloudy Quartz both do not appear in Season eight. However, his daughters appear.