He is found in Giant Volcano 20F. He has the Fiery Drum, one of the Seven Treasures. You might need Amber Tear and Tight Belt because the Tight Belt will keep your belly from going down but DON'T USE LINKED MOVES OR WALK THROUGH WALLS. And the Amber Tear will give an Extra 10% Recruit Chance. Once you are in the summit, return the Tight Belt and take the Amber Tear. I have no idea what level Heatran is, but he might be Lv.47 or whatever. PS: He may be recruitable without Amber Tear.
secret rank you get this by beating frosslass and save scizor
No.
The land, Pokemon, and dungeons are extremely different.
Arceus and Shaymin are the only two Pokemon of the series not to feature in Pokemon mystery Dungeon 2
use wonder mail type it in on the internet e.g heatran wonder mail
No,arcus is not in mystery dungeon 1 or 2
You have 2 fight heatran,arceus,articuno,groundoun,rayquaza,kyorge darkrao and your dad
there is no shaymin (or arceus) in mystery dungeon 2. in Pokemon mystery dungeon explorers of the sky (check out serebii.net for that), there is shaymin and arceus, but i don't know if shaymin is recruitable.
Answer:Yes
arceus isn't in Pokemon mystery dungeon 2. he is maybe in Pokemon mystery dungeon 3.
Pokemon Mystery Dungeon 1: Red Rescue Team/ Blue Rescue Team Pokemon Mystery Dungeon 2: Explorers of Time/ Explorers of Darkness
If you're talking about Pokemon Mystery Dungeon Explorers of Time or Pokemon Mystery Dungeon Explorers of Darkness, you can recruit as many Pokemon as you want. If you are talking about Pokemon Mysatery Dungeon Blue Rescue Team or Pokemon Mystery Dungeon Red Rescue Team, you can only recruit a certain number of Pokemon per friend area.