Scene: Inside the Hyperbolic Time Chamber - Four Months In
Goten and Trunks are drenched in sweat, their clothes torn from months of intense training. They stand before a faint crackling void, their most successful attempt so far to replicate the dimension-tearing attack.
Trunks: [panting] Four months in here, and we still can't get it right. We've managed to open the Earth dimension, but the other one... nothing.
Goten: [wiping his forehead] Yeah, but we're close, Trunks. I can feel it. We just need more power.
Trunks: [thinking aloud] The problem is we're running out of time. Four months here means only four hours on Earth. We've got a party to get back to, or my mom's going to kill me!
Goten: [grinning] Then let's give it one last shot, but this time... as Gotenks.
Trunks: [nodding] Agreed. Let's do this!
The two step apart, facing each other. They take a deep breath and begin the Fusion Dance with precision.
Goten & Trunks: [in unison] Fuuu-sion... HAA!!
A brilliant flash of light engulfs the chamber, and when it clears, Gotenks stands in their place, grinning confidently.
Gotenks: Gotcha! Let's finish this once and for all!
He powers up, his energy shaking the chamber. First, Super Saiyan 1. Then Super Saiyan 2. Finally, Super Saiyan 3, his long golden hair flowing with immense energy.
Gotenks: [smirking] Alright, time to break some dimensions!
Scene: Earth - Capsule Corp and Nearby Areas
As Gotenks powers up, tremors ripple across the Earth. At Capsule Corp, Bulma drops a tray of snacks as the ground shakes.
Bulma: [panicked] What's happening? An earthquake?
Vegeta: [sensing energy] No... this isn't an earthquake. This is energy—massive energy!
Goku: [serious for once] That's... Gotenks. What are those kids up to?
The tremors grow stronger, windows rattling and items falling from shelves.
Scene: Hyperbolic Time Chamber - Breakthrough
Inside the chamber, Gotenks unleashes a powerful scream, his energy creating ripples in the fabric of space. A small tear appears in the void, smoke and energy crackling around it.
Gotenks: [excitedly] There! I see it! We're almost there!
Goten: [from within] Keep going!
Trunks: [from within] Don't stop now!
Gotenks focuses all his power on the tear, the chamber vibrating violently. The small tear grows larger, revealing a swirling vortex of smoke and light. Suddenly, Gotenks defuses, and Goten and Trunks collapse to the ground, exhausted.
Trunks: [panting] We... finally did it.
Goten: [weakly smiling] Yeah, bro. Look at that.
They stand up, staring at the swirling portal before them.
Goten: Let's check it out.
Trunks: [grinning] Yeah, sure. After all, we've come this far.
They step toward the portal, its energy pulling at their clothes and hair. Taking a deep breath, they step through together. As soon as they enter, the portal snaps shut behind them, leaving the Hyperbolic Time Chamber empty and silent.