but when creating an emulator AVD the lowest Target that is available is 4.2.2
Then you need to download the others from the SDK Manager:
Depending on the API level/OS version, you will see:
- ARM EABI v7a System Image
- Intel x86 Atom System Image (for use with the accelerated emulator)
- MIPS System Image (not typically useful)
- SDK Platform (which includes ARM system images, for Android through Android 3.2)
Download what you want, and they will appear as options for you in your AVD Manager.