Alpha 1.0.16_02 is a Java-based PC version. It was never developed for Android (which uses the Bedrock/Pocket Edition codebase).
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The exact seed used for that infamous screenshot has since been discovered by the community: at coordinates X=5, Y=71, Z=-298 . While many players download this version to "hunt" for the entity, it is important to note that Herobrine has never actually existed in the official game code. How to Download and Play Alpha v1.0.16_02 Alpha 1