What to do after you beat Red?

I know you can get the two starters, and fight Clair & Lance, but what else can you do after you beat red in HGSS? What legendaries can you catch and where do you catch them? I hope this thread becomes a resource for people who have just beat red and don't know what to do like me!

Well, you can rematch every gym leader in the game, by first finding them, getting their phone numbers and then battling them at the Saffron city Dojo.
Serebii.net has more info on that.
There aren't any legendaries that are unlocked after you beat red, but you can still catch all that are in the game, Latios or Latias depending on version, Lugia, Ho-Oh, Zapdos, Moltres, Articuno, Mewtwo, Raikou, Suicune, Entei, Groudon or Kyogre depending on version, then Rayquazza.
The only thing really to do though is finish the national dex

yeah i agree as Jolteon But however if y beat the elite four you can battle red but after the battle you have to battle the elite four again and then you can battle red other than that jolteon and Jayorw said it all

Fill up that national dex!

Jayorw wrote:I know you can get the two starters, and fight Clair & Lance, but what else can you do after you beat red in HGSS? What legendaries can you catch and where do you catch them? I hope this thread becomes a resource for people who have just beat red and don't know what to do like me!

You don't have to beat Red in order to fight Clair and Lance. You just have to have beaten Blue

Edit: ALSO - after you beat Red, your main goal should be--as always--TO CATCH THEM ALL! ;D

Resolved so locked.