How do I obtain a nether reactor core in Minecraft Pocket Edition?

How do I obtain a nether reactor core (as well as other blocks that cannot be obtained/removed)?

2 Answers

The nether reactor core can no longer be crafted or found in creative inventory and can only be obtained through inventory editors currently. Source here.

You can't obtain them the normal way. You would have to use an inventory editor. I'm pretty sure they still work, though.