A Shiny creature is extremely rare, so it's simply a case of checking every one you are looking for - such as Magikarp - in the hope it will be a different colour. Often, the variation is somewhat ...

A creative Pokemon fan assembles a series of LEGO blocks to create a customized replica of the iconic water-type Pokemon ...

For every pokemon ... catching shiny pokemon before, but the previous version was extremely limited. It only worked with a fishing rod, so unless you want a ton of shiny Magikarp the earlier ...