In the Hanna Barbara 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!," instantly go into jet plane mode and launch while yelling "I'm coming, Richie!"
In one 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.
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.