Pokémon Super Mystery Dungeon/Chapter 1

Those That Live in This World, And Those That Have Come to This World
The game will begin with a cutscene in which it shows Deoxys looking over at the world, clearly worried. After the cutscene, another will start with the player waking up in a small clearing within a forest. The player notices how thirsty they are and heads over to a pool in the clearing. After taking a drink (and exclaiming how fresh and delicious the water was), they realize that they are a Pokémon. They begin to freak out again before hearing weird noises coming from the Beeheeyem nearby. The Beeheeyem attack, causing the player to run. They run until they run into Nuzleaf, who also gets hit by the Beeheeyem, causing both of the Pokémon to run.

Open Pass
They run through the first two dungeons, with Nuzleaf explaining the way the game works. The first dungeon is particularly easy. All you have to do is do what Nuzleaf tells you. The first enemy you see will get killed by Nuzleaf, but the next one you have to do on your own. It's recommended to use your best move. Each starter has one move that's actually good, while the rest are decent. Use the best move you have and move on. The next room gives you your first item, an Oran Berry. Useful mainly for when you get dealt too much damage (which shouldn't happen this early, by the way). The next room has some stairs for you to use. Go down the stairs. On the next floor, Nuzleaf will let you take the lead. After he tells you that you can lead the way, the controls will appear on your bottom screen. Press B and continue through the hallway. Kill all enemies you come across.

When you get to the next flight of stairs, go down them. The game will then ask you to Save and Continue. Just select Save and Continue and keep going. This will often happen before the next cutscene and/or dungeon in the story. After you escape the dungeon, Nuzleaf will ask you why they attacked you. After a cutscene in which he questions you, you and Nuzleaf continue on to the next dungeon.

Lush Forest
The first thing Nuzleaf explains is that when you make a move, so do your enemies. So you can sit there all day and they won't do anything until you do. Useful, but not at the moment. In later dungeons, when you need to be more strategic, this helpful hint is useful. The best way to skip a turn and make your opponents move is to use A to feint. A isn't all that powerful so this is it's only purpose in the game (apparently). After Nuzleaf so perfectly demonstrates this on an opponent (before killing it), he leads you to another room to let you test it. Then, when you reach a particularly long hallway, he shows you how to run, and lets you demonstrate it. Here you can open up the menu if you'd like and mess around with your settings. Once you're satisfied, run after him.

After he's done teaching you the rest of the controls, you get a notification saying that you can check the menu any time for info on the controls. Go down the stairs and enter the next floor. The next floors are easy. There are some enemies sleeping near some of the room entrances (either the developers are trying to troll you or it's so you can gain Exp. early in the game. There are only 4 floors in the dungeon so this should be fairly easy. Find the stairs and kill all enemies on your way.

After getting through the dungeons, Nuzleaf will decide to leave you behind because you caused trouble, before realizing that you ARE a kid. He then decides to take you to Serene Village, where you will meet your partner in the game.