MOD Portal 2 for MCPE (previously Portal Gun) adds many of the features as found in the popular first-person puzzle-platform Portal games. The gameplay elements include features like the PortalGuns to place portals, a GravityGun which can be used for both blocks and mobs and lots of other nifty tools.
See the installation guide for the installation manual.
DISCLAIMER: This is an unofficial application for Minecraft Pocket Edition. This application is not affiliated in any way with Mojang AB. The Minecraft Name, the Minecraft Brand and the Minecraft Assets are all property of Mojang AB or their respectful owner. All rights reserved. In accordance with http://account.mojang.com/documents/brand_guidelines