The latest video game from the storied anime, Dragon Ball Z: Kakarot is an adaptation of the original Dragon Ball Z saga, but, in trying to flesh out the world a little more, adds a few details here and there. Most of these are fairly superfluous. Knowing Puar impersonated Yamcha after his death or seeing alien tourists on Namek won't radically alter your interpretation of the saga. But going into detail about Chi-Chi's homelife might.
Chi-Chi's homelife is seldom explored outside the main canon of the manga. The anime gives some filler arcs that elaborate a little bit on it, but Dragon Ball Z: Kakarot might be the deepest exploration of Chi-Chi's character in the post-Dragon Ball world. And we learn a few non-surprising tidbits...as well as some of the adventures Chi-Chi embarks on.
Chi-Chi's Home Life
Chi-Chi, in Dragon Ball Z properly, spends much of the first two-thirds encouraging, sometimes intensely, Gohan to become a scholar. While she supports Goku and Gohan while they go off fighting well enough, she always believes her son should turn his attentions away from the brutal combat of Goku and friends, and to academic studies.
But at the same time, she doesn't want anyone to hurt her boy and she is proud of Goku and his accomplishments. This is best personified in the filler story that takes place shortly after the Frieza Saga, where Chi-Chi hires a tutor named Mr. Shu for Gohan. Shu is from the very onset clearly abusive, brandishing a whip and using belligerent tactics against Gohan, such as insulting Goku to his face. This, naturally, results in Gohan retaliating, and, while Chi-Chi at first believes Shu's narrative about Gohan going wild, she ends up throwing him out the window the moment he insults Goku in front of her and hits her son in her presence.
Chi-Chi would later cool down when she had Goten, actually training him in martial arts. This is typical for parents, who often are far more strict with their firstborn than their second. But the important thing to glean from this is that Chi-Chi, despite years since her last major fight, remained a perfect martial arts trainer for young Goten. But while Goku and Gohan clearly fear Chi-Chi's wrath, she really hadn't demonstrated much combat experience in the series proper. Sure, she fights a few soldiers in the Lord Slug movie and proves dangerous during the Garlic Jr. arc, but when did she have time to train as a fighter?
The Untold Saga of Chi-Chi
In Dragon Ball Z: Kakarot, Chi-Chi appears far more mellow than in the anime or manga. While she still pushes Gohan to study, she seems way more supportive of Gohan and Goku's adventures. Her role as a cook is emphasized here, due to the game's focus on cooking mechanics. As such, there are multiple side-quests centered around gathering ingredients for recipes for her or helping Chi-Chi cook better meals.
During one of these missions between the Saiyan and Namek Sagas, Chi-Chi sends Gohan out to a local village to retrieve ingredients in order for her to prepare a big, full meal. Gohan arrives at the villager and speaks to a farmer, who apparently is friends with Chi-Chi. During a brief conversation, the farmer reveals that Chi-Chi regularly protects her and the other villagers from the savage wolves in the area, presumably with her bare fists.
What This Tells Us
This might not get a lot of attention in-game, but this revelation sheds a ton of light on Chi-Chi and her ability to take care of her family. Chi-Chi's father, the Ox-King, helps support and take care of the family. Despite Ox-King being incredibly wealthy, it's established throughout the series they don't have a ton of money. Goku, after all, needs to get a job during Dragon Ball Super in order to support his family. So how can Chi-Chi afford the tons of food necessary to feed her insatiable family?
Simple: she earns it by protecting villages in the area from wildlife. Gohan is just handed the food just by establishing his connection to Chi-Chi. Most of the villagers don't bat an eye when Gohan or Goku pluck carrots from their farms, in part, perhaps, because of game mechanics making them only respond to direct questions, but also perhaps in part because they recognize that Goku and Gohan are related to their protector, Chi-Chi.
This also explains how she could keep in shape enough to train Goten. She fought and fought and kept fighting the whole time. We just never saw it in the series proper because the show never focused on it -- except, of course, when Chi-Chi needed to throw tutors out windows. This secret revelation doesn't seem like much, but it does fill in a few loose ends that fans probably casually asked but never seriously considered.