Yeah, that episode does bend toward Contest shipping, but I feel that Advanceshipping is strongest in the 9th movie, the epsiode the Bicker the Better, and the Battle Frontier episode where he loses to Brandon (I think it was the time he ended up possesed) where when he cheers about something May says "oh stop it, you're making me blush" even though Ash wasn't talking about or looking at her. lol
There's just something about Drew that gives me the creeps, even more than Harley, can't put my thumb on it though. >_> Not a bad character, just I dunno . . .
Also, this is the list of how old I think each of the main characters in Pokemon(as of Season 11):
Brock: 21
Tracy:18
Misty:17
Barry:16
Paul:16
Ash:15
Harley:15
Drew:13
May:13
Casey:13
Kenny:12
Dawn:11
Max:9
Odds are you probably have them listed younger, because I'm trying to make it feel like there's some sort of time consistency through the episodes (such as referencing how Ash said it's been a whole year since he visited Viridian in the very long Season 1), although by the end of Gen V I'll probably have to give up trying that, especially since it's already starting to feel too much like they don't age.