Mega Man/Heartwarming

The Classic Series

 * Roll giving Megaman her medicine so he can stop Wily in 10.

Cartoon series
"Dr. Light: Mega! [hugs him]"
 * Dr. Light hugging Mega in the Bad Future episode. Megaman had been gone for about 30 years due to a time travel mishap, and the city had been taken over by Dr. Wily. Having found that Roll and Dr. Light were imprisoned, he broke in to break them out. Light, who had been scribbling equations on the cell walls, turns at the sound of his voice.

Film version

 * Roll wanting to teach Megaman about life and having fun.
 * Roll wanting to teach Megaman about life and having fun.

Battle Network

 * Mamoru's scenario in the third game. If you didn't feel touched by then you have no soul.