The Gumball Guardians are introduced in this episode as the "Guardians of the Royal Promise," though this was dropped from later episodes and they became just the guardians of the kingdom itself.
Finn also says, "Get those hot buns in here, girl!" to Tree Trunks while she is carrying a basket of hot buns in The Pajama War (2015).
It is the first appearance of Mr. Cream Puff and the General.