It's A Shadow Pokemon. A Bodybuilder Has It At The Under Subway And Snagem Hideout.
The first starter you get a phenac city after beating the game you can find the others at the shadow Pokemon lab and snagem's hideout.
The Team Snagem Hideout is located in the Orre region of the Pokémon series, specifically in the game "Pokémon Colosseum." It is situated in the outskirts of the city of Phenac, accessible after defeating certain trainers. The hideout serves as the base for the villainous Team Snagem, where they carry out their plans to steal Pokémon. Players must navigate through the hideout to confront Team Snagem and progress in the storyline.
A lot of stuff one thing is to beat Rayquaza.
Visit Cipher Key LAir, receive a phone call from ONBS about Hordel, go to the Snagem Hideout.
You need to follow the other events, I can't remember what but the Snagem Hidout shows up on your map afterwards then you can travell to it like the other cities.
To reach Team Snagem's hideout in Pokémon XD: Gale of Darkness, you need to first progress through the game until you obtain the Snag Machine. Afterward, head to the outskirts of Phenac City and make your way toward the desert area. Look for a cave entrance that leads into the hideout. Be prepared to face Team Snagem members as you explore inside!
If you didn't battle the red mystery trainer back in phenac city wait until you beat the game and capture all the shadow Pokemon you can and purify and wait until you receive an emai mentioning a trainer with a quilava go to where they are either the shadow Pokemon lab or snagem's hideout and get the quilava.
All you have to do is go to team snagem hideout and then fight all the people there and then fight the leader
To get the L-Disk, you need to first obtain the D-Diskfrom Gonzap in the Team Snagem Hideout. Use the D-Disk in The Under and the UFO will take you to the Deep Colosseum. On the ground there will be something shiny (this is not the L-Disk). Pick up the item. It will be a pair of steel teeth. Return to the main section of The Under and use the F-Disk. Talk to the old man near the side of the gorge in front of the Under Colosseum and he will ask for the teeth. He will give you the L-Diskin exchange.
You don't have any other chance to get Hitmontop. Many Pokemon you have a second chance at getting in the Snagem hideout, but not this one.
To get Ho-Oh you have to catch and Purify ALL shadow Pokemon ( if you didnt catch them all you can go to SNAGEM hideout to get some of them) then go to Mt. Battle in Battle mode NOT in story mode... get to Challenge Number 100 and beat the guy who is there after you beat him Ho Oh will appear on your Box (warning IF YOU DONT HAVE ENOUGH SPACE YOU WONT GET HO-OH!!!)