Also...being the pokemon that you are as your MC and/or even some other pokemon you would want to be; would you want to evolve? Factoring in your size limitations, new abillities, body type, your relationship with your partner(can they evolve also? will they like it? will they be sad you changed? things can/cannot do with your partner, etc.), your new weaknesses as well, and finnaly; the thought that you cant change back.
Sorry if i'm a little off topic, although i already answered it
Well the mystery dungeons are always changing shape and form and are always random! Thats why they are called mystery dungeons! Because they are always changing
Hi, Welcome to the club! I have that exact set of pokemon in the newest PMD Universe!