Scooby-Doo / Heartwarming

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Shaggy is the only one trying to keep the gang from bickering with one and other, but the most prominent occasion was his banana split analogy. When he mentions who the toppings are, he mentions that Velma is the "sweet and sour mustard sauce that goes on top." Before quitting, Velma does show appreciation to Shaggy. This shows in its own way that even though Fred and Velma argue about who should get credit, Shaggy's at least the only person who knows where credit is due.
Shaggy and Scooby are fighting, but the instant Scooby gets dropped down a hole, Shaggy goes to rescue him.
Shaggy: Friends don't quit.
After Shaggy rescues Velma and the others, she says "I always knew you were a hero, Shaggy"
Fred stops his attention seeking at the end to give Velma a chance to be in the limelight.

This exchange between Daphne and Fred.
Daphne: What can I do? The only thing I'm good for is getting caught.
Fred: You never let that stop you before. And if that's not a true hero, then I don’t know what is.
After their earlier argument, Shaggy tries to talk Scooby into running away before the sacrifice can be performed.
Shaggy: Who's your best buddy?
Scooby: Raggy.
Shaggy: Right. And who's my best buddy in the whole wide world?
Scooby: Rooby-Doo?
Shaggy: That's right, Scoob, you are. And we're like two trippy peas in a far out pod, man.
- Made even more heartwarming by the fact that Shaggy is Scooby's owner in the cartoons; Shaggy evidently picked Scooby to be his dog.
Despite the break up of the gang the feuds do not spill over to Shaggy and Scooby, who none of the gang treat badly. Most noticeably when Fred and Velma meet at the airport they display frustration, heighten and reciprocated by seeing Daphne. When Shaggy sees them? He's excitedly greets his friends and Velma's reaction is to ask where Scooby is.
- The novelization also says that Daphne (from whose POV this chapter is written) is still thrilled to see Shaggy.
- Actually Fred and Velma first meeting at the airport seem to be on relatively decent terms and they almost look happy to be on the same flight.
Once Mary Jane is freed from possession, she thanks both Shaggy and Scooby for saving her - giving Scooby a kiss (in spite of her allergies).

No matter what you think of Scrappy, This◊ is still pretty sweet.
- Heck, Scooby and Scrappy's bond in general.
- Meta example: Despite how slow it's becoming, Scrappy is recieving some surprisingly amount of supporters and even defenders who feel he should be brought back and even given some Character Development to appeal to the detractors. Only time will tell if Cartoon Network/Warner Bros. listens.
A meta-example. There were originally six members of the gang - Too Much (a dog like Scooby), Geoff Jones, Linda Blake, Kelly Summers, Mike Andrews, and a brother-Linda's, W.W., whom based on the concept art seems to be younger then the others. If you subscribe to the idea that Linda became Daphne (based on their last names), then her mentor figure to Scrappy in the eighties cartoons becomes even more heartwarming - she might well have her little bro back.
James Gunn, the screen writer for the 2002 film still thinks Making Scrappy the villain was funny, he ultimately did apologize for the character's sudden heel face turn. What caused him to do so? Running into distressed children who had gone into the movie and had been blindsided and brokenhearted by the twist. He has never touched Scrappy's character since, and though he still doesn't feel much differently about Scrappy, he does express regret for hurting feelings.