Hmm.. I was surprised by how much Ash cared about one of Dawn's Pokemon.
On the subject of care and concern between these two, i am going to ponder a question don't know if it has been asked before but hey.
What are your favourite episode(s) where Dawn shows concern for Ash and his wellbeing?
Pokemon Ranger and the kidknapped Riolu (2)- Dawn is realy happy and relieved when Ash returns after being captured by Hunter J, and shows concern when Ash is upset about Riolu by saing "Oh Ash"
The keystone pops - Where Ash is battleing Spiritomb she shows concern by saying with "Please be careful ash", and when he gets hit by Spiritombs Giga Impact her face is horrified
Mass Hip-Po-Sis - a couple of times Dawn shows concern for Ash, when he goes down the cliff to rescue Hippopotos and when he gets chicked in the River lateron (though Brock does as well in that scene)
Chimchared - I think we all know about that one
Tears for fears - Not much but when Ash saves Chimchar from Zangoose and gets hit Dwan shouts "Ash No"
I might be mad , but i look for episodes where they show deep concern for each other but mainly when Dawn shows it for Ash. Off topic for a sec i used to do that in the first couple of seasons with Ash and Pikachu.