How do you get ender dragon as a pet?

In minecraft, you cannot obtain the Ender Dragon as a pet in the traditional sense, as it is a boss mob that cannot be tamed or kept. However, players can use mods or plugins in certain versions of the game to enable the Ender Dragon to follow them or act as a companion. Alternatively, players can create a dragon-themed environment or use spawn eggs in creative mode to simulate having a pet dragon.