The Guard Penguins first appeared in the episode "What Have You Done?" They carry axes made of ice and guard the Ice King's castle. They patrol only a very small area, so it is easy to sneak past them. Finn and Jake did this by ducking and rolling from different points. It is unknown whether they patrol any other locations in the Ice Kingdom.
- They can be picked as a setting on the Mixit Video Creator.
- They also appear in the game Legends of Ooo.