The two end-of-series special episodes of the Diamond & Pearl series (DPS01 and DPS02) following Ash's friends after they part ways are currently the only ones of this kind that are missing from any listing.

For the other seasons, these specials are either listed under the end of the regular seasons or under the Specials season. So they should be included either in the end of the 13th season (Sinnoh League Victors) or the Specials season.