Why can't I get a pwnhammer?

Solution 1:

It is a feature that isn't really implemented yet. You can try the Pwnhammer by importing hacked worlds or hack your own world.

Solution 2:

Terraria for android devices does not include hardmode, which means beating the wall of flesh does not put you into it. It doesn't drop the pwnhammer either, but may drop other useful items.

Solution 3:

As of September 4 2014, the mobile version of Terraria on Google Play, iOS app store and Amazon app store have been updated to include most PC hardmode content such as the hardmode bosses, ores and armor. The minimum version required and release dates for each platform are

• iOS: 1.1.5536 released on Aug 27, 2014
• Amazon: 1.1.5822 released on Sep 1, 2014
• Google Play: 1.1.5822 released Sep 4, 2014

If you don't see hardmode content, you should check your game's version to see if it has been updated. See Terraria Wiki's mobile version history article for more information.