Pokemon Sirius: Hey, do you remember Pokemon Vega – a Japanese Pokemon hack? Do you remember its author – the one who just wants to create a super difficult hack version, Unknown Jap (at least that is his nickname)?
Pokemon OA Emerald is a hack of Pokemon Emerald. Well, its author wants to improve his Pokemon hacking skill. So, a product was released as we are knowing now. I can say this hack is a good one, the hacking skill is truly impressive.
Pokemon Mega Emerald X & Y Edition is a fan-made remake version of Pokemon Emerald. The author wants to have a superior version of Emerald about the number of Pokemon, so he created this hack.
Pokemon Expert Emerald is a Pokemon Emerald hack and it was created by Blue on PokeCommunity (Well, I guess after becoming a Pokemon Champion, Blue changed his job to become a Pokemon Hack Maker).
Pokemon Emerald Legendary: Do you know what is a Legendary Pokemon? Do you know how powerful it is? Do you know exactly how many beings of Legendary are living in this Pokemon world?