All data obtained from @SonOfTheBronx on Twitter:
Son Of The Bronx/Programming Insider
Sept 1st, 2018 (MHA Marathon)
| Time | Show | Ratings | A18-49 |
|---|---|---|---|
| 10:00pm | My Hero Academia | 445,000 | 261,000 |
| 10:30pm | 375,000 | 219,000 | |
| 11:00pm | 389,000 | 219,000 | |
| 11:30pm | 427,000 | 243,000 | |
| 12:00am | 411,000 | 233,000 | |
| 12:30am | 383,000 | 226,000 | |
| 1:00am | 375,000 | 218,000 | |
| 1:30am | 356,000 | 195,000 | |
| 2:00am | 320,000 | 187,000 | |
| 2:30am | 309,000 | 189,000 | |
| 3:00am | 361,000 | 215,000 | |
| 3:30am | 355,000 | 208,000 | |
| 4:00am | 343,000 | 210,000 |
Sept 2nd, 2017 (DBZ Kai Marathon)
| Time | Show | Ratings | A18-49 |
|---|---|---|---|
| 11:00am | DBZ Kai | 838,000 | 521,000 |
| 11:30am | 718,000 | 469,000 | |
| 12:00am | 709,000 | 453,000 | |
| 12:30am | 700,000 | 444,000 | |
| 1:00am | 613,000 | 399,000 | |
| 1:30am | 578,000 | 347,000 | |
| 2:00am | 521,000 | 333,000 | |
| 2:30am | 481,000 | 307,000 | |
| 3:00am | Attack On Titan | 555,000 | 287,000 |
| 3:30am | Samurai Jack | 422,000 | 277,000 |
If you want more data, you can check my spreadsheet here;. That will have further data including per year difference and A18-49 differences.
Let us know what you think in the comments below about the ratings.