Luigi now had a new problem, all the meta humans that he had faced were not really a problem but now the reverse flash was now the most dangerous of them all, he was a ruthless speedster hell bent on taking everything from Luigi even going as far as trying to kill Mario, but the reverse flash was found out to be Luigi, or more specifically his evil alter ego, Mr. L. But the worst part about it is that Mr. L was a part of Luigi, meaning that he knows everything about him and his weaknesses and everything about Mario as well so now Luigi needs get faster and train to take him out

Mario and toad walked into star labs watching Luigi running on the new treadmill that Cisco and professor E. Gadd made for him, the treadmill is designed to track his speed, right now his speed was at 1,460 mph.

"Luigi, are you sure you need to be faster to beat the reverse flash? You seem fast enough already."

"Yes Mario, first time I met him he was at least 4 times faster than me and just about 2 weeks ago I know I was still at around the same speed when I faced him the first time, I think he was just screwing with me last time we were fighting."

"But why did he want to kill me?"

"He said that he was from the 25th century and found out about me and him destined to be the reverse flash and be beaten by me and said since he couldn't have the happy life that I have then he would try to take it from me so I got to get faster and stop him before he can do any more damage."

"Are you sure you're getting faster Luigi?"

"Yes, I could only go about half this speed first time I got my powers."

"Hey I just noticed, since when did you become angry and brave instead of timid and scared?"

"After mom was murdered I was always scared that he would come back and kill me and that constant fear stuck with me but now since I got these powers I can do more, I can be more, I feel complete now but then he came back and now I will take him out with any means necessary even if I have to kill him I will, just so I can make damn sure he can't hurt anyone ever again."

"Then we need to get you stronger. And we have been working on this for a while."

They walked into what looked like an arena, it was big enough that Luigi can run at his fullest without feeling cramped.

"Welcome to the arena, and look what we made for you." Cisco pressed a button and a solid hologram of Luigi stood on the other side.

"Cisco… how is a hologram going to help me fight reverse flash."

"This is a tangible hologram, if it punches you then you feel it, have fun."

"WAIT! Why does it look like me?"

"Think of it as an un suited reverse flash since I don't really know what he looks like, but I did add red lightning to tell you apart."

"Fair enough."

Luigi cracks his knuckles and pops his neck and rushes his double. They both run each other punching and dodging flawlessly, both struggling to land a hit on the other. They ran around the arena and on the walls, the hologram double in front and the real Luigi trying to catch up. They were both matched in speed. Luigi quickly turned around still running on the wall and ran the other way at the hologram grabbing it then throwing it to the ground with him landing onto it perfectly. The hologram wasn't finished yet so it ran at him, they both ran at each other both bouncing off the other and then running back doing it again. This went on for about a minute then Luigi ran to punch the hologram with it catching his fists both trying to push the other away, then Luigi kneed the hologram in the stomach, the hologram ran back to one side and Luigi ran to the other, Luigi ran at it again and the hologram did the same, Luigi tried a new tactic, when he ran close enough he did a baseball slide and knocked the hologram to the ground. Luigi knocked it out and then ran up a wall, ran off the top and let his momentum carry him into the air, he did a half backflip so that his head was pointing to the ground upside down then twisted his body so that he was still upside down but facing forwards like he was flying towards the ground and flipped onto his feet before he hit the ground crushing the hologram which then disappeared.

Cisco and the rest of the star labs crew (professor E. Gadd, Mario, and Toad)

"WOOHOO damn Luigi I didn't know you could move like that."

"Neither did I Cisco, that was intense."

"Hey how did you jump that high without shattering your legs?"

"Well Mario, I call that a speedforce jump, I summon a bit of the speedforce lightning around my legs making that absorb the shock."

"I think your ready Luigi."

"I hope so professor."