OK there are a few things I wanted to explain. This is a simple silly guide I made which might help someone get a better understanding of the Anime as compared to this game. While I fully suggest you watch the Anime first, some people just don't have the time.

My math here will not always add up, as there are tons of filler episodes. I at first started writing all of the skips, and fillers in, but that turned into a damn cluster. one look at the original list and no one would want to watch the anime. So it looks pretty, at the expense of math and sizing.

While some arcs have huge numbers, most of the time the game level only covers a few episodes which include the battle taking place.

Game level: Anime arc

Prologue: 1 to 3, (3 episodes)

Chap1 Ep1: 4-8, (5 episodes)
Chap1 Ep2: 9-18, (10 episodes)
Chap1 Ep3: 19-30, (12 episodes)
Chap1 Ep4: 31-44, (14 episodes)
Chap1 Ep5: 45-53, (7 episodes) (2 Fillers)
Chap1 Total: 50 episodes

Now Skips: 62-77

Chap2 Ep6: 78-91, (14 episodes)
Chap2 Ep7: 92-130, (39 episodes)
Chap2 Ep8: 144-152, (8 episodes)
Chap2 Ep9: 153-195, (43 episodes)
Chap2 Total: 117 episodes

Now skips: 196-228

Chap3 Ep10: 229-263, (35 episodes)
Chap3 Ep11: 264-312, (48 episodes)
Chap3 Ep12: 313-325, (13 episodes)
Chap3 Ep13: 337-381, (45 episodes)
Chap3 Total: 152 episodes

Now skips: 382-384

Chap4 Ep14: 385-405, (21 episodes)
Chap4 Ep15: 422-452, (27 episodes)
Chap4 Ep16-17: 457-489, (33 episodes)
Chap4 Total: 104 episodes

Now skips: 490-516

Chap5 Ep18: 517-522, (6 episodes)
Chap5 Ep19: 523-574, (53 episodes)
Chap5 Ep20: 579-625, (48 episodes)
Chap5 Ep21: 629-746, (118 episodes)
Chap5 Total: 229 episodes