Fu sorta just left Zerofuku to fight Demon King Piccolo...he will come back later as Mira and Towa also deiced to move on...
Mira and Towa have arrived at New Namek while Metal Cooler and Goku are fighting....they power up Metal Cooler by giving him his Supervillian form...then Towa summons Yamcha (The one that collected a few Dark Dragon Balls when he fought the Shadow Dragons) Yamcha is surprised to be randomly teleported but see's Metal Cooler and freaks out....running for his life...
Fu appears and saves Yamcha from a Finger Blitz Barrage and reaches into the Infinite History to summon an ally for him...searching around for a few seconds...he...well...grabs a Large Object, and it burst through the Portal...its a HUGE Airship that crashes into Metal Cooler....the ship explodes with the force of Frieza's Supernova and absolutely obliterates Metal Cooler.
Fu and Yamcha are a bit surprised by this...they weren't really expecting a whole Airship....but a figure emerges from the Ship....somehow still alive...he seems really pissed off at...something.
The man turns to Fu and begins to yell at him for messing up his plan...announcing himself as Ren Hiyama
During his little argument with Fu....Metal Cooler regenerates...
Metal Cooler: You...YOU! How dare you! *He fires another Finger Blitz Barrage at Ren...but he moves out of the way*
Ren: Hey! Punk! Watch it! You wanna fight!? IFRIT! You got this! *He takes something out of his pocket....a Small Robot that comes alive and gives on an intense Heat*
Ifrit: *Jumps at Metal Cooler and lands a Solid Blow to his head...and then the 2 get into a Clash...with Ifrit doing most of the damage....burning holes in Metal Cooler and Metal Cooler trying to hit the small target.*
Metal Cooler: Thats it! *He jumps out of Ifrits way and kicks him to the dirt...* The Big Gete Star didn't just upgrade me...he upgraded...all of me! *He laughs as thousands of Metal Coolers appear*
Yamcha: Oh...oh man! Fu!? Do you got anything to help?
Fu: Umm...I'm not really gonna interrupt Metal Cooler and Ren's fight...its up to him now! See ya! *He leaves through a rift*
Yamcha: Guess I gotta fight too... *He stands next to Ren in his fighting position,* You gotta distract the Metal Men alright? I got a pl....*He suddenly feels a HUGE power from behind him...he turns around only to see Mechikabura standing there...not doing anything except watching...*
Yamcha: Im going to die...Ren you gotta save us...that guy over there is going to kill us if we dont get outta here quick!
Ren: I know what I'm doing....calm down! Ifrit! INFERNO MODE!
Ifrit: *Begins to burn with a fierce flame...somehow not burning himself.*
Len: We shouldn't lose...Ifrit has this. I haven't lost before and I don't plan on losing now!
Ifrit: *Jumps up into the air and fires a Prominence Raid...disintegrating hundreds of Metal Coolers...but the Metal Coolers keep on coming...*
Yamcha: Neo Wolf Fang Fist! *He begins to shred apart a few Metal Coolers before being overwhelmed...but saved by Ifrit a few moments later*
Fu suddenly appears again
Fu: Yamcha! Len! You gotta destroy the Big Gete Star and its Cre in order to beat the Metal Coolers! *He grabs Ren, Ifrit and Yamcha and teleports them to the Big Gete Star*
Yamcha: *Looking directly at Meta-Cooler Core* So your the big bad computer huh? Spirit Ball! *He throws it at the Core...and it just turns around and shoots a Full Power Energy Wave at Yamcha...who dodges*
Meta-Cooler Core: You will NOT defeat me! *He begins to shoot multiple beams at the group...but Ifrit holds them off using Prominence Raid.*
Ren: Yo Yamcha! Just destroy the core and let's end this!
Yamcha: Alright! I'm trying! *He attacks the core a few more times...but isn't doing much of anything*
Meta-Cooler Core: ENOUGH! *He blasts Ifrit a few more times....almost destroying him*
Yamcha: Ugh! Kamehameha! *He fires the beam at the Core...actually doing more damage that using regular attacks,* Ren! Have your Robot dude fire that attack he does!
Ren: Ifrit! You heard the guy!
Ifrit: *Charges and fires his Prominence Raid at the core*
Yamcha: *Fires a Super Kamehameha at the core*
Meta-Cooler Core: No! *He fires his own beam...but loses the beam Struggle...causing him to burn up into ashes...*
Meta-Cooler Core Voicebox: The...Big Gete Star...enabled me...
Ren: Oh Shuddap! *He stomps the voicebox* Glad thats over...Ifrit! get over here!
Ifrit: *Hops on Ren's shoulder...but it Begins to malfunction...and it explodes violently....*
Yamcha: Ren! You okay!? REN!?
Fu: *Appears* So...you survived? Interesting....
Mechikabura *Appears in front of Yamcha and blast him* Give me the Dark Dragon Balls...we both know you cant hope to stand up to me...
Fu: Ohhhh man...Yamcha...Ill go get some help! *He leaves through a rift just as a blast was coming his way*
Yamcha: Urghhh...that....hurt... This is going to suck...