In Tiers & In Order

~S Tier~

1)Battle Frontier

2)Unbeatable (Advanced Battle)

4)Tie Between: This Dream (Advanced Challenge) & We Will Be Heroes (Battle Dimension)

5)Battle Cry - (Stand Up!) (Galactic Battles)

6)The Journey Starts Today (Journeys)

7)Journey To Your Heart (Master Journeys)

~A Tier~

8)Rival Destinies

9)Black & White

10)It's Always You And Me (Adventures In Unova (& Beyond))

11)The Challenge Of Life (Ultra Legends)

12)Believe In Me (Master Quest)

13)Under The Alolan Sun (Sun & Moon)

14)Be A Hero (XY Kalos Quest)

15)I Wanna Be A Hero (Advanced)

16)Under The Alolan Moon (Ultra Adventures)

17)We Will Carry On! (Sinnoh League Victors)

~B Tier~

18)Stand Tall (XYZ)

19)Diamond & Pearl

20)Born To Be A Winner (Johto League Champions)

~C Tier~

21)Pokemon Johto (Johto Journeys)

22)Pokemon Theme (Version XY)

23)Pokemon World (Orange Islands)

~D Tier~

25)Tie Between: Pokemon Theme (Original Series) & Pokerap GS (Chronicles)

~Averaged Out Series~

Chronicles is excluded from these averages because I can't decide if it counts as Original Series or part of Hoenn since I see arguments for both. Plus it's side series anyways. (This makes the original Pokemon Theme number 24 for this part) Lower Averages are better.

7)Original Series - 20
(If Chronicles were to be included, average becomes 21)

6)Pokemon the Series: XY - 18

5)Pokemon the Series: Sun & Moon -13.33...

4)Pokemon the Series: Diamond & Pearl - 11.5

3)Pokemon the Series: Black & White - 9

2)Pokemon Journeys: The Series - 6.5
*Worth Noting This Is Subject to Change If/When more openings are released*

1)Pokemon the Series: Ruby & Sapphire - 5.5
(If Chronicles were to be included, average becomes 9.4, place moved to 3rd)