In the Hanna-Barbera adaptation, Irona's bodyguard function is rather charming. The moment she receives a distress call from Richie, she will react, "Uh-oh, Richie's in trouble!" She instantly goes into jet plane mode and launches while yelling, "I'm coming, Richie!"
In one comic book story, Richie is trying to think of a birthday gift for his father, but he can't think of anything for the man who literally has everything. Finally, he goes to his dad and invites him to go to a baseball game. In the final frame, Richie hears his father on the phone with a friend. His father is breaking down crying, telling the friend that his son gave him the best birthday gift he could imagine.
In another comic book story, Richie caught measles, so the doctor places him and everyone else at Rich Manor in quarantine for the following week to prevent the disease from spreading and that includes Freckles and Pee Wee Friendly, who were visiting Richie when the doctor gave his diagnosis. As the week passes, Mr. and Mrs. Friendly become afraid that, after one week with the luxuries of Rich Manor, their sons will rather stay there than return to their home once the quarantine time is over. Fortunately, once the kids return, they're too happy upon seeing their parents again to care about luxuries.
Richard and Regina Rich make it clear that their vault contains childhood memories and treasures, not money or gold (the opposite of the comics).
Van Dough: Are you kidding me? You mean to tell me that there isn't a single gold bar, or emerald, or thousand-dollar bill in this entire mountain?!
Mr. Rich: Well, I'm sorry to disappoint you, Lawrence, but that's not what we treasure.
To enter the vault, Richard and Regina have to sing a duet in harmony, and the song they use they know by heart.
Better yet: The song is "Side by Side", which is about loving someone no matter how poor you are.
The end where Richie is playing baseball with his friends, and his parents call him truly the richest boy in the world.