The time I was fused with my cat and sent into the Dragon Ball world

The Test and the Zone.

Clashing fists. A tail throwing a bald man. Mine and Krillins spar has been going on for a while now. Roshi seems to have fallen asleep, so we kept going under my idea to try and wake him up.

"I can feel myself learning already, Krillin. My control over my power is improving with every attack!" My voice echoed, intentionally raised to try and wake the old pervert that is Roshi.
"You seem to have even more potential than Goku, how are you learning so quickly?!" Krillin audibly questioned, genuinely curious, and trying to rouse Roshi from his eternal slumber. I let off a small smile. "I don't know myself, but it feels like my body is adapting to this world. Developing my control the longer I'm part of it." I responded to him, finally kicking him to the ground.

At the same time, a face I recognise from hours upon hours of Dragon Ball content appears. Son Goku. He seems distressed. The spar comes to a stop with my victory. He isn't even focused on my presence, though. "Krillin, I need your help. My son was kidnapped. Gohan and the Dragon Ball are gone!" Goku's voice rang out, a mix of rage and worry.

Krillin became shocked visibly. Goku had a kid? He can't focus on that though, as I shake him back to focusing.
"Krillin, I know we've just met, and this is the first time I've met this man, but I know who Goku is. I'll explain how later, but I'll go with you and Goku. I have a feeling I've figured out something." I spoke up, joining the conversation. Upon finishing my sentence, I try to pour all the adapting to ki control into flight. By sheer luck, or willpower, maybe a mix of both, I ascend into the air. "Goku, Krillin, point me in the right direction, and I'll fly there."

Goku and Krillin look on shocked, Goku finally sensing my power, but he points the right way. I'm gone almost instantly, flying across the skies. Arriving at Garlic Juniors Castle right as the wish for immortality is done, I land and glare down Garlic Jr. He simply grins with malice. "Oh, what do we have here? Some cat man, trying to show he's hot stuff?" Garlic Junior comments with a smug tone, making my very clear anger rise.

Kami crashes down nearby, landing from a ray of golden light. It clears, revealing the old Namekian as Goku and Krillin arrive on the Flying Nimbus. Kami reads my mind briefly, sees my life, and simply nods in acknowledgement. No words need to be spoken. The fight is set.