Pokémon qualifications/potentials are divided into eight types:
Red
Orange
Yellow
Green
Cyan
Blue
Purple
Gold.
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Corresponding respectively:
Rookie (Red 0-20)
Ordinary (Orange 21-40)
Advanced (Yellow 41-60)
Pseudo-Elite (Green 61-70)
Elite (Cyan 71-80)
Pseudo-Champion (Blue 81-90)
Champion (Purple 91-100)
First-class Legendary (Gold above 100)
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There are Ruins and Secret Realms in the world.
Secret Realms are divided into four types:
1. Primary/Beginner
2. Intermediate
3. Advanced
4. Top-tier