After you defeat him, you go to Pallet town & pick up your 1st generation Pokemon starters in Prof. Oak's lab.
Then, go to Saffron city, & go to Silph Co. & look for steven, once you meet him he will say to pick a shard.
Make sure you have space in your team, so take only 5 Pokemon w/ you.
there is a blue shard, a red shard, & a green shard.
If you choose the green shard, then you get a treeko
if you choose the red shard you get a torchic
If you choose the blue shard, you get a Mudkip
Then, go to Pallet town, Mr. Pokemon's house, will give you the Red Orb (Soulsilver) or the blue orb (heartgold) you can go to the cliff cave in route 47 & fight Groudon(soulsilver) or Kyogre(Heartgold)
If you have both Groudon & Kyogre, then go to Prof. Oak's lab, he will tell you a story about both Pokemon, then, I think it's he that gives you the green orb, if he doesn't then go to Mr. Pokemon's house, then he will be the one that gives you the green orb, when u get the orb, go back to Cliff cave, & your level 50 Rayquazza will be waiting for you.
If you forgot where mr. Pokemon lives, then go to Cherrygrove city, go to the house in the Northern end of Route 30, don't go to the house closest to the city, because that's not Mr. Pokeon's house.
Chat with our AI personalities
you defeat Pokemon trainer red and then he comes to silph co
no trainer
if you played Pokemon red and green you should know who red is in this game he's the strongest trainer you will ever fight in the game if you want one of the hoenn or kanto starters you must scale mt silver and defeat him.
Your Rival
No trainer has that Pokemon in that game. But you can migrate it from Fire Red and Leaf Green I think.