Shiny Pokemon or 'Shinies' are categorized by their unusual colour. Often they have colours that are muted or that belong to a completely different colour palette than their normal conterparts. Shiny Pokemon are also gifted with higher stats than their normal forms and it is this, combined with their unusual colouring, that makes them so popular with Pokemon trainers. In Pokemon Battle Arena, shiny pokemon are given a 25% HP boost, therefore, pokemon are sold for up to 10X more money.