Who does ash kiss in Pokemon?

This is a quote from Pokemon Wikia about Bianca from Pokemon Heroes:

"After helping save Alto Mare, she ran to Ash, who was leaving, and kissed him and gave him a picture. However, it is unknown if it was either Latias in disguise or the real Bianca who really to kissed Ash, although it is most likely Latias who did it, because the Bianca who kissed him wasn't wearing a hat."