Verified answer

Rotom: During the night, go to Old Chateau (In Eterna Forest) and find a room with a TV. If there's no Pokemon in it, then go back at a later time. It's Level 15, so be careful.

Spiritomb: You need an Odd Keystone first. Either go underground or get one from a blackbelt west of Hearthome. Get it to Hallowed Tower (east of Hearthome) and then go underground. There talk to 32 REAL people (No hikers). You don't need to talk to them at the same time. Spiritomb is Level 25.

Heatran: He's at the top of Stark Mountain. You need to finish the Buck Quest first though. It's Level 70.

Regigigas: With the three other Regis in your party (Through migration) go to Snowpoint Temple. Finish the puzzles and Regigigas awakes at Level 70.

Ok, I've got it covered!

Rotom- The Old Chateau mansion in Eterna Forest. In one room, a TV set is on. At night go up to it and press A. If you get the option to hit the TV, you are about to battle Rotom! If not...come back later in the night and try again. Rotom will be at Lv. 15. It's types are Electric and Ghost. NOTE: YOU MUST HAVE THE NATIONAL DEX TO GET ROTOM.

Spiritomb- At anytime before actually putting the stone in, get the Odd Keystone from a Karate person at the end of Route 208. Then, talk to 32 people Underground. These people cannot be traders. They must be other players. Also, you don't need to talk to 32 different people. You just have to talk to human players 32 times. Then go to the broken crumbling tower in the middle of Route 209. Place the Odd Keystone inside. If done correctly, you should now battle Spiritomb. It is at Lv. 25. Its types are Ghost and Dark.

Heatran- First go to the Fight Area. Then, follow Buck (the guy dressed on red) to Stark Mountain. Team up with him to reach the centerwith the treasure. Then, leave. Find Buck (Ithink in a house in the Resort Area) after this and talk to him. Then, return to where you found the treasure in Stark Mountain to find a Heatran waiting for you. It is Lv. 70. Its types are Fire and Steel.

Regigigas- NOTE: YOU NEED THE NATIONAL POKEDEX BEFORE DOING ANY OF THIS. First, go to Pal Park and transfer over Regirock, Regice, Registeel from a GBA game(s). Then, go to Snowpoint City. Go to the northernmost part of the town to find the temple. MAKE SURE YOU HAVE REGIROCK, REGICE, AND REGISTEEL IN YOUR PARTY WHEN ENTERING THE TEMPLE! Candice will then allow to go in. Then, go to the very bottom floor to find a Regigigas. Reach it by sliding across the icy tiles. When you are there, press A in front of it to battle it. Regigigas is at Lv. 70. It's type is Normal.

Hope this helps.

All of this pokemon are available after you beat the elite four and get the national pokedex.

Rotom - go to eternia forest and go into the house during night. Go upstairs and enter the second room on your left. Check the television and rotom will appear.

Regigigas - Go to snowpoint temple. At the last floor, you will find regigigas and it will only fight you if you have regice, registeel, regirock on your team.

Rotom: Go to the old Chateu(?) in Eterna forest. Go to the second floor and go through all the rooms until you see a tv. Talk to the tv, and Rotom should appear.

Spiritomb: Get the odd keystone from a guy on route 308 and put it in the broken tower on route 309. Link up with your friends and talk to them 32 times. Go back to the hallowed tower and fight spiritomb. (I actually didn't get it yet....:( )

Heatran: Go to the survival zone, and follw the path until you get to the Mountain. You should meet up with a guy named Buck, team up with him. Find your way through the cave, get the rock, leave, and come back. Heatran should be there.

Regigigas: Migrate your regis from Pokemon Ruby/Sapphire/Emerald and bring them to the Snowpoint Tmple. Capture Regigigas

Shiny pokemon are pokemon that are multicolored. For Example normal pichachu is yellow Shiny pokemon is a green, blue, red and etc. pichachu and you can get a shiny pokemon if you catch or encounter a wild pokemon 5 times I don't have any shiny but I know a lot

Rotom - Old Chaeuto (wateva)

Spiritomb - Route 209

Regigigas - Snowpoint temple

Weatren- Stark mountain

You need to get the National Dex b4 getting these legendary Pokemon. If you do have it, then search on gamefaqs.com

Key word: Pokemon Diamond.

= )

in 5 days

i feel like pokemon is coming back. you hear so much about it lately. yeah but i only remember red and blue, those games were fun. i tried the others but they were too complicated lol

you can get the walkthrough and guides on gamefaqs.com

you must search for pokemon diamond and then look for the guides they have... they usually very good about telling you stuff like that...