Look what I got today!
Three shiny Beldums, chained on Platinum.
Also, three conclusions.
1. I was either very lucky, or Beldum is very easy to chain, of course with the right technique.
2. Sandstorm is a pain in the ass.
3. Despite being easy to chain, getting an actual shiny is not so easy.
Here are some tips for those who want to chain.
1. Tilt the DS Lite a bit to you. Sandstorm makes it hard to easy any patch shaking, but if you move it a bit forward, the screen gets a bit darker, sandstorm less visible, and grass much better.
2. Bring a lot of Repels. I needed a few super repels per a shiny Electrike, but I needed about 40 super repels per one shiny Beldum.
3. Get Master balls if you can. Catching one of these is like catching a legendary. It has a catch rate of 3 which is the least it can get. I cloned 30 master balls on Emerald and transferred them to platinum specially for Beldums.
4. Stay focused, due to its low appearance, you'll need a lot of time to see a shiny Beldum. Even the shiny patch isnt so easy to spot. One mistake and chain is broken (
thanks Dugtrio)
5. Of I forgot, have a Pokemon with a Magnet pull with you, it can get very handy. I dont know how much are chances of continuing with it, but probably greater than the usual 88% (4 patches away).
Anyway,
So awesome! I'll definitely get more :D