>>55640700Let me put together all the evidence that it was Latias and not Biacna/Kanon
1.
>>55608115 The original version of this scene Bianca's hat was not there. When the movie was sent over to be localized by NoA they paid to have it changed to give it more ambiguity
2. The SWSH Event Latias. This one knows Sweet kiss, a move that cannot be taught through tutor/TM/Breeding and is most likely a reference to the kiss she gave Ash
3. The movie is a classic boy meets girl story between Latias and Ash. (not exactly "good" evidence of it but it makes sense considering what those types of movies lead too) For me there is legitimately no way to watch this film without seeing the romantic chemistry between the two.