Fish anywhere with an old rod, catch a magikarp, then get it to level 20.
you dont need to find them you have to fight(and is best to catch) the red garydos on the lake. you dont need to find them you have to fight(and is best to catch) the red garydos on the lake.
magikarp
You can't control when to get shiny wild Pokemon, they just appear occasionally. For instance, I found a shiny Meditite at Acuity Lakefront on Pokemon Diamond. I had no idea I was going to find one, but hey! The "Red Garydos" mentioned at the beginning on Diamond and Pearl is a shiny Pokemon. You can actually catch it. All you need to do is get Surf, and surf around in the middle of Lake Verity for a while. It takes a long time, but you will find a shiny Garydos. You can get an Action Replay. On Action Replay, you can get a code for all wild Pokemon being shiny.
Evolve Magikarp at lv20, or if you're luck, you can find some at Sootopolis City, use Super Rod.
at the start of Pokemon pearl and diamond when you watch the tv and theres a program about a lake the Pokemon in the lake the Pokemon is the red garydos all so on Pokemon platuim Cyrus talks to mesprit at the lake
On Diamond and pearl you don't really see many fire Pokemon or electric types. But really the rarest ones are legendarys. Also Garydos is a good Pokemon hard to get without super rod
It is said that the Probability of encountering a shiny Pokemon is 1 out of 8192. I have personally never encountered a shiny (apart from Garydos) but it does happen.
after you defeat red garydos you will receive red scale, take it and go to mister Pokemon who lives alone up from cherrygrove city and he'll give an exp.share
Don't think it does evolve. however it would be cool if it did! I don't use my red garydos in my party anymore as it is just as useless as a normal blue garydos.
Magikarp evolves at level twenty into a Garydos.
Squirtle, Garydos, Margikarp and Prof. Oak
you cant, but there is only 20% chance to catch him.