The ghastling is the happy ghast's baby variant in Minecraft. This creature was added to the title with the Chase the Skies game drop. It does not have much use apart from being a stepping stone ...

First, you need to understand that the only way to increase a happy ghast's flying speed in Minecraft is through commands. The creature is not affected by any swiftness potion thrown at it.

Instead, you'll need to spawn it into the game using cheats. Here's how to get a command block in Minecraft, using either Java or Bedrock edition.