Pretty neat....hmmm...this makes a GS remake even more likely, imo.Originally Posted by CoronisOk, many of you are wondering what ever happened to the Red Gyarados, and here's the deal.
At the beginning of the game, you watch a TV report about a rampaging Red Gyarados in a distant lake, then your rival believes that a similar creature will be present in your hometown lake, a.k.a. the Trust Lake, and thus drags you there. Of course, there's no Red Gyarados there since it's never meant to be there, and naturally it was never mentioned again as the story progresses.
Given the extensive amount of GSC reference in D/P, this Red Gyarados could very well be the same one in the Lake of Rage in Johto, since D/P seems to take place around the same time as GSC.
In other words, the Red Gyarados was just a dramatic way to begin the story, but it was never in Shinou, so you won't encounter it in gameplay.
There are numerous other GSC references in the game. A man talks about a silver pokemon at the Whirl Islands, a rainbow pokemon at Tin Tower, as well as the Clefairy dance on Mt. Moon.