Answer:
Did yo love this dragon ball fanfiction story
Gogeta vs gotenks
Goku : Vegeta let's have a match with our kids.
Vegeta:ok
Goten: Dad let's have a fusion battle please.
Trunks: please dad
Goku: did you agree Vegeta
Vegeta: ok . But which fusion
Goku:let's have metamoran fusion
Vegeta: ok
Goku,Vegeta:Fusion ha
Goten,Trunks: Fusion ha
Gogeta: ok Gotenks come on show me what you have got.
Gotenks: okay dad
(Gotenks rush at Gogeta but Gogeta dodge like ultra instinct and give punch so hard at Gotenks face.)
Gotenks: Ouch that gotta hurt.
Gogeta: I think you need more training.
(Gotenks turn into super saiyan and rushed into Gogeta. Suddenly Gogeta grab Gotenks hand and hit on the gotenks belly with elbow.)
Gotenks:Gaaaaaaaaaaaaaaaaah
Gogeta: Oh my god you gotta hurt again.
Gotenks:
(Gotenks get angry and done Super Kamikaje ghost attack but gogeta dodge again and destroy his all ghosts.)
Gogeta: That's my son I am proud that you are my son.
Gotenks: why?Is that I am doing good. dad?
Gogeta: Yes but you need more training.
Gotenks: Dad but you also very strong you defeated my super saiyan form without any transformation.
Gogeta: I am hypothetical. I have god power.
Gotenks: ok super saiyan 3 (Gotenks turn into super saiyan 3)
Gogeta: hey you think you will defeat me in this form.
Gotenks: I will try.
Gogeta: that's my son.
(Gotenks rush at gogeta but Gogeta grabbed gotenks leg and thrown him in the sky and done transmission and kick on the gotenks face)
Gotenks:aah (he fallen down.)
Gogeta: Gotenks get up.
(Gotenks got up and rushed at Gogeta to punch him But this was the end Gogeta grab Gotenks hand and punches so hardly in Gotenks belly.)
Gogeta: oh my god sorry Gotenks.
Gotenks: blurp
(gotenks fainted)
Gogeta:(hugged gotenks)Are you okay Gotenks!
(After half an hour the fusion time limit has over.)
Goku: Vegeta we hit our sons that they got fainted.
Goku:Goten are you okay.
Vegeta: Trunks you also.
(After few minutes goten and trunks had woken.)
Goten: Oh my God that powerful punch.
Trunks: my stomach is now aching.
Goten: my also
Goku: sorry goten
Vegeta: I am also sorry Trunks that punch was too hard.
Vegeta: Kakarot let's end this fight our sons do not feeling good.
Goku: ok let's end this. Okay goten let's go home.
ya...