Fanon: Most of the fandom views White—Victini and Zekrom as the "canon" version, since Ash being the Hero of Ideals is much more in character for him then the Hero of Truth. This is also consistent with the anime's Story Arc pertaining to the legendary dragons having N as the Hero of Truth and noting a connection between Ash and Zekrom.
Hype Backlash: When the (dual) movie was released, it generated quite a bit more hype than usual - possibly due to the popularity of its namesake games and the anime series appearing to get a bit better at the time, as well as the dual-movie gimmick and limited US theatrical release. Now the movie's largely been forgotten, and especially isn't considered to be up to the standards of the better movies in the series (including its immediate successor). Not helping matters is Best Wishes widely being considered the anime's Dork Age, although this movie is far from the lowest point of the Unova season.