It was in the official Black/White guide that Zek and Resh can be shiny, not just serebii speculation. Serebii posted its results on that... Rumors were going around that in RSE, the 100th space launch took you with it to fight deoxys... So whatever rumors you heard were to piss people off most likely of that nature --- Hoppip bottles in the ice, using Blizzard. When I'm training, do it light, X-Scissor using Scizor am I right?
"The rumors I've heard is that they still cannot be shiny at Dragon Spiral Tower, so Serebii was wrong."
Notice the emphasis; http://zeark969.blog38.fc2.com/blog-entry-2009.html --- Serebii from the amazing Serebii.net Your #1 Source for ALL Pokémon Games & Anime info as the top online Pokédex & Attackdex!
From: zack7521 | #008 Yes you can by trading the egg or something
Manaphy is an event-only Pokemon. The event Manaphy absolutely cannot be shiny. Therefore, there is no legal way to get a shiny Manaphy. --- Echo Ciroid/b Desert Operations Liquid Cooled Anti-Armor Railgun