A few months after defeating Sonic, Infinite wiped out a Resistance squad in the City, before turning his attention to the sole survivor, the Avatar, who cowered in fear. Mocking and taunting them, Infinite allowed the Avatar to flee with their life, only so he could relish in their terrified screams, and maybe just maybe when looking at the rookie whose squad he just killed he saw himself at that same moment when shadow killed his squad
Six months after defeating Sonic, Infinite went to the Spaceport, but did not get involved in the Resistance's infiltration there. Sometime later, Infinite went to the Mystic Jungle to pick up Eggman's remaining Phantom Ruby prototypes so they could be disposed of before they could be used against Eggman. While there, Infinite met Silver the Hedgehog, whom he decided to crush to send a message to the Resistance. Although Infinite easily defeated Silver, he did make Infinite drop a Phantom Ruby prototype without noticing it. Before Infinite could finish Silver, however, Sonic, who had been broken out of prison, showed up and interrupted him. Intrigued by Sonic's arrival, Infinite attempted to rattle him, only to get brushed off by Sonic, who tried getting the secret to his power from him. Infinite refused, however, and knocked Sonic away to deal with him. Although Sonic put up a better fight than before, Infinite still beat him. Seeing Sonic as no threat to him, Infinite left.
Meeting Eggman in Green Hill, Infinite destroyed what was thought to be the last Phantom Ruby prototype. During their subsequent talk, Infinite revealed to Eggman that he let Sonic go after their last battle. While Eggman was greatly concerned over this, Infinite dismissed his worry. After then ignoring some sounds, Infinite asked Eggman if their plan to wipe out the Resistance went on as usual, which Eggman confirmed, and the two briefly relished at the thought of their victory before Infinite took his leave.
When the Resistance attacked Metropolis, Infinite showed up, and, on Eggman's orders, unleashed his Phantom Ruby's power. Creating gravity shifts and giant monstrous versions of himself, Infinite cast the Resistance into chaos, resulting in the Resistance suffering huge casualties before withdrawing. Watching the anarchy, Infinite wondered aloud if the world would send him a challenge, just as the Avatar from all those months ago, now a Resistance rookie, approached him, though Infinite did not recognize them. Sensing their fear, Infinite tried to intimidate them. However, when the Avatar chose to stand their ground, Infinite fought them. After a bit of fighting, however, Infinite recognized the Avatar. He proceeded to summon cannons to finish them off, but, because the Avatar wielded the Phantom Ruby prototype Infinite dropped earlier, they were immune to his attack. Though at first shocked, Infinite dismissed them upon defeating the Avatar and departed, stating that only two days remained before the Resistance was to be wiped out.
After the Resistance destroyed the Phantom Rubies' primary power source onboard the Death Egg (thus leaving the Eggman Empire with only their backup reactor underneath the Eggman Empire Fortress), an infuriated Eggman had himself, Orbot, Cubot and a reluctant Infinite retreat to Metropolis. When the Resistance attacked the city again, however, Infinite appeared before Eggman when Sonic and Tails came to capture the doctor. On Eggman's orders, Infinite opened a portal into Null Space, which sucked both Sonic and the Avatar into it, seemingly trapping them forever. However, while Infinite and Eggman were losing Metropolis to the Resistance, Sonic and the Avatar showed up before them again, having just escaped Null Space. While Infinite was only slightly displeased about this, a furious Eggman had them withdraw to the Eggman Empire Fortress.
When the Resistance Army stormed the Eggman Empire Fortress, Infinite confronted them with an army of his Phantom Copies while the rest of Eggman's forces backed him up. Fighting through, Sonic and the core members of the Resistance faced him. Infinite, however, easily blasted them back and got ready to finish them off, only to get caught off-guard by a fully repaired and vengeful E-123 Omega. Growing irritated by the opposition, Infinite initiated Eggman's endgame: using his Phantom Ruby, Infinite created a virtual sun that he planned to drop on the Resistance, which would destroy them. As Infinite was about to drop his sun, however, it suddenly got canceled out by the Avatar and the Phantom Ruby prototype they were in possession of.
Weakened from creating his sun, Infinite withdrew to the center of the fortress, although Sonic soon caught up to him. Confident that he could still beat Sonic, even in his weakened state, Infinite engaged Sonic in battle until his Phantom Ruby copy was fully recharged. As he got ready to finish Sonic though, he was interrupted by the Avatar, who joined forces with Sonic. Working together,
Eggman Empire Fortress, cloudy day.
Sonic is facing Infinite as the latter hovers in the air over the edge of a ramp before the Central Tower of the fortress.
Infinite:
Pathetic little hedgehog. Even with the Phantom Ruby weakened, I still have enough power to smash you into blue jelly. I'll show you how outclassed you really are!
Sonic:
I'm in a class all my own. Time to put-up or shut up, [Points at Infinite] Infinite!
Sonic runs up and leaps at Infinite.
Infinite fully charges up his Phantom Ruby prototype. He is back to full strength.
Infinite: You're done for, Sonic. The Phantom Ruby's energy is recharged.
Infinite performs a powerful energy wave.
Perish, along with your useless friends!
The Avatar intervenes in the battle, shooting out their grappling hook at Infinite. Infinite dodges and glares at the Avatar, who scowls right back.
Infinite: You!
The Avatar lands beside Sonic, and both train their angry glares at Infinite.
Sonic: My friends got me this far, and together we're gonna win!
and thats when the final confrontation happens
[INFINITE]
I'm the tallest of mountains
I am the roughest of waves
I'm the toughest of terrors
I am the darkest of days
I'm the last one that's standing
Don't try to stand in my way
'Cause I've been up against better
Just take a look at my face
'Cause if you're messing with me
I am a dangerous weapon
I am the sharpest of blades
I'll cut you down in a second
'Cause I was born in this pain
It only hurts if you let it
So if you think you can take me
Then you should go and forget it
And after all this time, you're back for more
(I won't stop until they know my name)
So I'll take what's mine and start this war
(I'm coming at you like a tidal wave)
When everything you know has come and gone
(You are at your lowest; I am rising higher)
Only scars remain of who I was
(What I find in the ashes; you lose in the fire)
When there's no one left to carry on
(This is an illusion, open up your eyes and)
This pain (persists); I can't (resist)
But that's what it takes to be infinite
Yeah! So look around you, and tell me what you really see
I never end, and that's the difference in you and me
'Cause when your time is up, and everything is falling down
It's only me and you — who is gonna save you now?
So look around you, and tell me what you really see
You live a lie, and that's the difference in you and me
I have the power; let me show you what it's all about
It's only me and you — who is gonna save you now?
(Who is gonna save you now?)
I am the tallest of mountains
And don't you ever forget it
If you step in the ring
Then you're gonna regret it
Take yeah!
'Cause if you're messing with me
Then you should know that it's over
I don't crumble for nothing
I've got the world on my shoulders
And after all this time, you're back for more
(I won't stop until they know my name)
So I'll take what's mine and start this war
When everything you know has come and gone
(You are at your lowest; I am rising higher)
Only scars remain of who I was
(What I find in the ashes; you lose in the fire)
When there's no one left to carry on
(This is an illusion, open up your eyes and)
This pain (persists); I can't (resist)
But that's what it takes to be infinite
Yeah! So look around you, and tell me what you really see
I never end, and that's the difference in you and me
'Cause when your time is up, and everything is falling down
It's only me and you — who is gonna save you now?
So look around you, and tell me what you really see
You live a lie, and that's the difference in you and me
I have the power; let me show you what it's all about
It's only me and you — who is gonna save you now?
(Who is gonna save you now?)
Infinite is in a glitch-like state on the ground before Sonic and the Avatar after having been dealt a powerful defeat by them.
Infinite:
Impossible. I cannot be defeated!
Sonic:
Wrong, loser! The things that can't be defeated are heart, soul, and the bonds of friendship. Three things you and your counterfeit cronies lack!
Infinite pounds his fist on the ground in frustration at Sonic's truth, before finding himself being lifted into the air against his will
Infinite:
Struggles to stand up
No!
WAIT!
I CAN STILL FIIIIIIIIIIIIIIIIIIIIIIGHHHT!
After a couple more strained gasps as he continues to struggle against the force working against him, Infinite fades away and his Phantom Ruby prototype is dragged off to oblivion…