Very inefficient Pokémon will be put in the low tier. The ones that fit most of the above requirements are placed in the high tier. The goal of this in-game tier list is to recommend a select group of Pokémon for an efficient run through the game. Such a Pokémon doesn't exist, of course, but this means that Pokémon closer to this ideal are obviously the best ones to use.
The best possible Pokémon for an in-game team are the ones that are obtained at the start of the game, can OHKO enemies easily, take little damage from nearly any enemy, can learn many HMs, can heal themselves, can learn useful moves upon level up, don't need excessive TMs, and have a useful ability. Introduction High Tier Middle Tier Low Tier Bottom Tier Untiered Introduction
