You'll need to evolve it from Gloom with a Sun Stone.
you find it when you catch a bellosem there holding one hope i helped
Gloom can be evolved from a sun stone into a Bellosem. Remember, the stinkier the Gloom, the more pretty the Bellosem.
Get a gloom and give it a sun stone
gloom to bellosem and sunkern to sunflora.
Evolve using a sun stone where you can get if you win first prize in the bug catching contest
Nothing
You can't find it in Pokemon Gold. Wailer is a 3rd Generation Pokemon not available in 2nd Generation.
Go to google and type "Pokemon Gold Walkthrough" .
find out on your own nerds Pokemon sucks
you can probably find it on Ebay
you have to find and catch them
you cant find raiku in Pokemon pearl just Pokemon gold