"Hey, Oolong. If you promise to change and become a better person, who doesn't do this type of thing, I can let you out." Kakarot offered, shaking his shoe in his hand a bit just to annoy the tiny pig-man trapped inside.
Apparently, using his ill-gotten riches, Oolong, the shape-shifting pig, was keeping the girls he'd 'kidnapped' in a mansion just outside of town. According to him, he'd fallen into a vicious cycle. He'd see a girl, think she was pretty, kidnap her to his mansion, shower her in luxury…
And become her servant or something. Some of the girls called him 'sugar piggy' and refused to leave, even when he told them to. There were half a dozen young girls just lounging around Oolong's house waiting for him to come back with all the stuff they'd made him promise to buy for them.
He was actually rather glad to see them go. Even went so far as to thank Kakarot and Bulma for finally managing to send all of the spoiled girls home.
The duo wasn't so pleased with that, though. All the piggy had learned was that some girls tended to be handfuls. He didn't feel remorseful at all. Kakarot tried to ask him to repay the world by teaching the Saiyan the shapeshifting trick, but apparently it needed a magic power that Kakarot didn't have. Annoyed, Kakarot had to leave it be and forget about it.
Leave the pig to his own devices, though, even if he managed to convince all of the villagers to refrain from spit-roasting him for making them worry so much about their daughters, he'd simply find another village and go right back to what he was doing before.
Using his shapeshifting to threaten people into giving him whatever they had.
And unfortunately, they couldn't go to the police with this. A village this backwater? When Kakarot called '911', the cops had simply laughed in his face.
So, the young Saiyan and his genius friend ended up having to do things the hard way.
Taking off one shoe and one sock, Kakarot had borrowed a marker, written a seal on the side of the shoe, and used the Evil Containment Wave to trap the poor piggy inside of his shoe, using the sock as a makeshift lid, giving Oolong only the few inches of the 'toe' portion of the shoe to run around in.
Apparently, it was a terrible punishment for the pig. A few games of catch with the local children, and Kakarot's former sock was now a bit drippy and green, and the piggy inside was begging for mercy.
According to the pig, it stank something fierce. As you'd expect from a Saiyan's footwear. He was willing to beg, repent, convertto the Faith of Muchaboutlivinginanywherethatsnotashoe-ism, anything to get out of that shoey prison.
"I-I'll be a good piggy, I swear! Just get me out of here! Please, it smells like if 'Death' and 'My Butt' had a pork baby! Please!" Oolong pleaded.
"Good enough for me." With a shrug, Kakarot pulled the sock out of his shoe and let Oolong out of his temporary prison.
Then, the duo took their new Dragon Ball (and all of Oolong's Capsules) and drove up toward Mt. Paoz in one of Oolong's cars.
Naturally, Bulma drove, this time. Kakarot offered to drive, and Bulma chucked a rock at the Saiyan's head with such force that it actually left a small bump.
Oolong would go on to later convert his large, ill-gotten mansion into an orphanage, and he and the village elder would protect children who'd been unlucky enough to find themselves alone in the world from the cruelty of the outside for the next twenty years.
In the entrance hall always hung a drawing of a young boy with a tail, the caption saying 'Remember: I know what your aura feels like!'
…
"Uck! I might have to burn it." Kakarot muttered to himself, carefully holding the shoe in his hands as far away from his face as humanly possible as he held his nose shut with his other hand.
"The water's not helping?" Bulma asked, crouching down on the bank of the stream beside the young Saiyan. "Ugh! Nope. Definitely not." She agreed after a single sniff.
"It still smells just awful. Why did I use my shoe?!" He wondered to himself, "Don't you have a washing machine or something on you? You have a capsule house, right?" The boy asked.
"You are not putting that disgusting thing in my washing machine, unless you can get it to stop being green and smelling like pig vomit, Kakarot." Bulma told him, "I'm going to set the Capsule House up in that clearing back there. Maybe take a shower. Remember to knock before you come in."
Kakarot rolled his eyes. "Of course, Bulma. I'm not some creep, you know."
"Whatever, tiny teen."
"I'm eleven!" Kakarot called back.
"But you will be tiny long into your teenage years, Saiyan. One thing us weak humans have over you guys!" She taunted.
"Huh? Since when are humans weak?" Kakarot asked, scratching his head in confusion.
Immediately realizing that he was accidentally pressing his disgusting, stinky vomit-covered shoe against the back of his head, Kakarot freaked out and tossed the shoe into the grass behind him in disgust.
"See you in the morning, Kakarot!"
"Good night, Bulma!" Kakarot called back, trudging over to pick his shoe back up.
Maybe another wash in the stream would get it just clean enough that he can toss it into Bulma's washer overnight without making the entire capsule house smell like vomit.