[}-Discovered information as of Chapter 10-{]
[So... you know, don't read it if you haven't read up to chapter 10]
-Pokémon are creatures made of Aura, the essence of life.
-Pokémon cannot eat other Pokémon unless they are of the same typing for some reason.
-A Pokémon's level determines the 'level' of energy they can output at any given time. Levels increase when a Pokémon experiences a harsh battle and prevails.
-A Pokémon's potential determines the maximum amount of energy that a Pokémon can reasonably fit in their bodies. As such, it determines the max level of the Pokémon as well as their leveling speed.
It is believed that Potential is unchangeable by any controllable means. The only known way to increase it is to evolve your Pokémon and hope for the best.
(EXP isn't relevant to the reader; As only I, the author, can see it. However, I'll include it anyway)
D-Rank:
-Max Level at 19.
-EXP Gain is reduced by 5%.
C-Rank:
-Max Level is 39.
-EXP Gain is reduced by 10%.
B-Rank:
-Max Level is 59.
-EXP Gain is reduced by 15%
-???
A-Rank:
-Max Level is 79.
-EXP Gain is reduced by 20%
-???
S-Rank:
-Max Level is 99.
-EXP Gain is reduced by 25%
-???
[}-0-{]
If I'm missing any information here that you think should be included here, tell me. Reminder, I'm not going to write things down that the MC hasn't discovered yet or isn't obvious.