@Beanzy100000
Chaining is where you use the pokeradar (DPt) to chain pokemon and have a higher chance of getting shinies. It is very complicated and took me awhile to understand :P You can find a lot of information on it including how-to tutorials by using serebii, bulbapedia, smogon, youtube (for how-to videos. There are a lot), wiki.answers, ehow, and a lot of other sites. Just search "How to Chain for Shinies" on google. It will come up with videos and websites. Ignore if they say "How to chain for Shinies on Platinum/Diamond/Pearl" because they are all the same method. If you have any further questions regarding shiny pokemon feel free to PM me about it:)