Pokémon Mystery Dungeon Rescue Team DX is known for giving a chance to players to be a Pokémon, and not a trainer anymore. The one you get to play is selected from the other 16 after you complete a Pokémon personality quiz.
Which Pokémon can I be?
There are 16 Pokémon you can play as. Due to the fact that the Pokémon Mystery Dungeon: Red Rescue Team and Blue Rescue Team games were launched between 2002 and 2006, you will only get to play Pokémon from the first three generations.
You will take a personality quiz at the beginning of the game, and this is how they will choose your Pokémon. Each question will determine the nature of the Pokémon, like impish or brave. The final question is whether you would like to play as a boy or as a girl. Be careful because if you pick a boy, you will not be able to play Chikorota, Torchic, or Skitty, and if you choose a girl, you would not be able to play Psyduck, Machop or Cyndaquil.
Then you will be asked to pick a Partner Pokémon. It will stay with you for the entire game, and it will help you survive, so make sure you have someone worthy on your side. But the partner cannot be the same type as you.
About the questions
There are 57 questions in total, but you will answer eight random questions. There are 14 different categories. They include one category for each Pokémon nature, like quirky or lonely, and one miscellaneous category. An answer can relate to two different categories. If you want to play a particular Pokémon, you will need to be very careful with the answers that you pick.