Apart from adding features, Mojang Studios has removed some from Minecraft PE (Pocket Edition). Two are the Nether Reactor Core block and the Nether Spire structure.

Minecraft Nether reactor core It was added in the 0.5 update to Minecraft Pocket Edition Alpha and the 0.1 update to the New Nintendo 3DS Edition.

JAVA EDITION > BEDROCK EDITION! The nether roof in java edition is so insanely useful that i could not play bedrock edition ...

To help point these recipes out, here's a look at all of the interesting buildables that have been removed from Minecraft since its beginnings. Nether Reactor Core Via: maramokMCPE ...

One of the first major looks at Minecraft's overhaul of the Nether biome is available to play on the Java client now.

We look to be in the final stages of development for the Nether Update, and that means plenty of fixes in the latest snapshot.