(Just wanna say that Kefla vs Goku wont be the same as the original, there might be different moves and the sort, but UI Goku vs LSSJ 2 Kefla will happen.)
*3rd Pov*
As Yami quietly observed Kefla and Goku, Kefla decides to take the first move as she speeds past Goku which goes unnoticed by him.
[Whoa there!! I went flying!! But next time I wont miss!] said Kefla with a slight smirk on her face. Kefla decides to throw a kick next which is aimed towards Goku's head. Goku turns towards Kefla and bends his back backwards, making the kick just barely miss his head. Kefla quickly recovers as she stomps her right foot onto the ground and ducks quickly, sending her left leg all the way on the ground. Goku jumps, avoiding the kick to his legs but before he could dodge the next move, Kefla points an energy blast right in front of his stomach, sending him in the air. Goku smirks ever so slightly in excitement as he decides to send a few ki blasts towards the ground in front of Kefla in an attempt to make a smoke screen.
Kefla simply kicks the 5 ki blasts back at Goku who had just landed. He holds up his arms, blocking the blasts. Dust covers the area as Goku immediately uses instant transmission to appear behind Kefla. She reacts quickly as she parry's Goku's punch with he own, sending a shockwave throughout the area. Goku is sent back a few meters as Kefla sends a few ki blasts at Goku who had just recovered. Dust once again covers the area as what is left is Goku with a blue hair and aura. He turned Super Saiyan Blue.
[The real fight starts now, Goku!!] said Kefla as she starts to scream. A explosive green aura ruptures through the ground with Kefla's hair slowly turning green from the outside in. The aura eventually filters into Kefla, leaving her in her Legendary Super Saiyan form.
[Here I go!!] she screams as she dashes to Goku. With speeds surpassing what a mortal could ever see, she sends a rush of punches which is countered by Goku's own punches. They casually land a hit on each other until Goku decides to change things up. He quickly kicks under Kefla's legs, sending her into the air. Goku charges a kamehame wave and shot it at her, but before it could reach, it is blocked by her own blast which is filled with energy.
Goku retreats with a few back flips and then starts to send punches into the air, producing shockwaves. Caught off guard, the air punches land on her, sending her into a rock. She immediately recovers and dashes towards Goku who was charging another kamehame wave. The wave gets dodge as Goku activates Kaioken, somehow bending the wave with sheer power. The wave catches up to Kefla and traps her in it. As the wave ends, Kefla starts to use more power as she fires multiple blasts of green energy towards Goku who uses Kaioken x10 to simply hit them away. Goku arrives in front of Kefla and puts 2 fingers on his forehead. Kefla see's this and attempts to fire a blast around her, which fails as Goku reappears in the same position. He punches her sending her back into another rock.
Kefla decides to use the same strategy as she sends another few ki blasts towards Goku. He uses a Kamehameha and makes them explode, leaving him wide open. Kefla suddenly appears behind him and sends a kick towards his head. It fails as Goku turns Super Saiyan Blue 2 quickly ducks and kicks at her legs violently. Kefla coughs a little blood as she decides to use the full power of her form. She creates multiple after image's of herself who continue to send beams of green energy towards Goku. Goku starts to hit them, deflecting them back but before he could regain his breath, Kefla sends a punch towards his abdomen and then appears behind him and kicks his head. Goku is sent flying towards the ground with his back facing the edge of the arena.
[Now Kefla!! Send him out of the ring and defeat universe 7!!] screamed Champa, spitting in the process. Kefla just looks with anticipation towards Goku as he slowly but surely gets up.
[Not done.. I'm not done yet...] said Goku, trembling slightly. Seeing this, Kefla decides to speak up while charging.
[You still have more in you?! Than how about you taste this!!] said Kefla as she sends 2 ki blasts towards Goku. Goku doesn't even raise his head as his body suddenly stops listening to him. It started to act on his own. He sides steps to the right and avoids one of the 2 blasts. He then proceeds to side step to the left and dodge the other one. He then returns back to his normal position as the blasts are lost in the void.
[Wha- it must be a fluke!! There's no way you can dodge that!!] she said as she sent 5 more ki blast's this time, making sure that the accuracy was on Goku. Goku continues to step to the left and right as the 5 blasts go flying in the void, never to be seen again.
[Whats happening!!] exclaimed Kefla in shock as Goku finally decides to lift his head. Straight after, a silver aura surrounds Goku with an immense heat. Instead of his usual black hair, his hair had white growing on the very edges, on the same progress as the first time. Goku decides to jump towards a tall rock and starts to charge his power, screaming with a double voice. Kefla climbs to a rock on equal elevation a few dozen meters away. She also starts to charge up.
[So that's what you used against that gray guy? What's that transformation called? Ultra something?] she remarked, insulting a certain guy in meditation.
[Ultra Instinct. And I'm not the one to be biased, but that is pretty racist.] said Goku, surprising even the non-suprisiable Yami.
[Racist? Why should I care about that when I'm the strongest person!!] she said, powering up even further. Goku stops his charge as Kefla does the same. She charges some ki into her hands as she sends them at Goku. Goku... dies, yeah that's the end of this fan fic. THE END (not) BYE BYE!!