Power System
Pokemon Level, corresponding to Spirit Beast Age
Level 1-10 = 10 Years - 100 Years
Level 11-20 = 100 Years - 500 Years
Level 21-30 = 500 Years - 1,000 Years
Level 31-40 = 1,000 Years - 5,000 Years
Level 41-50 = 5,000 Years - 10,000 Years
Level 51-65 = 10,000 Years - 50,000 Years
Level 66-80 = 50,000 Years - 100,000 Years
Level 81-90 = 100,000 Years - 200,000 Years
Level 91-95 = 200,000 Years - 500,000 Years
Level 96-100 = 600,000 Years - 1,000,000 Years
Spirit Master Rank, corresponding to Pokemon Level
Soul Trainee, Rank 1-10 = Level 1-5
Soul Master, Rank 11-20 = Level 6-15
Soul Grandmaster, Rank 21-30 = Level 16-25
Soul Elder, Rank 31-40 = Level 26-35
Soul Ancestor, Rank 41-50 = Level 36-45
Soul King, Rank 51-60 = Level 46-55
Soul Emperor, Rank 61-70 = Level 56-60
Soul Saint, Rank 71-80 = Level 61-70
Soul Douluo, Rank 81-90 = Level 71-80
Titled Douluo, Rank 91-94 = Level 81-90
Super Douluo, Rank 95-98 = Level 91-95
Limit Douluo, Rank 99 = Level 96-98
Between Limit Douluo and God Official, Rank 99.5 = Level 99
God Official, Rank 100 = Level 100
3rd Level God, Rank 101-110: Pseudo-Legendary Pokemon
2nd Level God, Rank 111-120: 3rd Legendary Pokemon
1st Level God, Rank 121-130: 2nd Legendary Pokemon
God-King, Rank 131-150: 1st Legendary Pokemon
Supreme God-King, Rank ?: Peak 1st Legendary Pokemon
God-Emperor, Rank ?: Supreme Legendary Pokemon
Creator God, Rank ?: Creator Pokémon
This is my estimation of how Spirit Beast, Spirit Master, and Pokemon compare to each other. May be inaccurate, and might update it. But for now, that how I envision it for my novel.
Also in my opinion, the reason why spirit beasts above 100,000 is in great disadvantage compared to Title Doulou is because since Spirit Beasts isn't allowed to become God, they're unable to master the power of law while Titled Douluo are able to. Only Divine Beasts or exceptional powerful spirit beasts with outside help, such as Di Tian who relied on his 2nd Soul Core which is Yin Yang Core, to be able to use laws.