I’m gonna start. I chose the end because based on what we’ve seen I think it’s literally the end. Meaning it is infinite and only an immortal could survive. How could a living being survive the end? Who can kill the literal end?

Solaris is stronger than The End and can destroy dimensions with ease.

Meaning it can destroy its dimension.

Solaris, because it(?) is immortal.

I should’ve put an option for a tie as well. But isn’t the end literally “the end” as in finito, the last. How can one kill the end? It does say itself that it is infinite so even if its dimension were destroyed it would still live.

Ian Flynn explained that it was boasting.

And even if it was infinite, Solaris could destroy the universe. He's already done that.

I chose the end because first the end is immortal second i can destroy a plant with one blasts across and finally it took like millions of years to end the end so it lasted longer than soloaris and it was already there when solaris became a thing.

I chose Solaris just because I think its cooler and had a better theme (I mean, it had orchestral "In His World" as its boss music). Also, Solaris was far more successful than the End in their respective goals. When you fight Solaris, time itself is already fading away; when you fight the End, it has just escaped from Cyber Space and never actually does any damage to Earth in the present. Finally, Solaris (as Mephiles) directly influence the plot of 06, rather than just standing on the sidelines like the End.

Outside of the official confirmation that Solaris is stronger, he's an immortal being who's able to keep up with and physically beat up Super Sonic. While The End couldn't escape one dimension, Solaris destroys entire dimensions in minutes, not to mention that The End would have to beat it in the past, present, and future at the same time or he'd just come back, in which it literally can't do as there would need to be at least three of it.

@Sonic sim Solaris can destroy a universe just from existing, which I think is stronger than blowing up a planet, and I don't think Solaris just came into existence one day, though we don't really have a backstory for him.

The End.

1: Ian's statement about Solaris being stronger is HIS OWN OPINION. Not an official confirmation like others say. He's even said as much in the November 13th Bumblekast.

2: Solaris is dead, meaning he's NOT immortal like some people preach. If he was then he wouldn't have been literally wiped from existence. Ian even said that he's inclined to agree that Solaris' feats as the Final Boss were due to the Chaos Emeralds, not his own innate power. The mere notion of otherwise is inherently contradictory to the canon events and facts.

3: Contrary to the cherry picking most people do in regards of how Solaris can be beaten, there is a way to bypass that which is literally said in Sonic 06: destroying his consciousness. Which would render his body braindead and catatonic across all of time. Which is not only EXACTLY what happened, but also something The End can pull off VERY EASILY.

3: The End wasn't able to do much after being released because the heroes moved to prevent it from doing anything as soon as it got out. Unlike with Solaris, whom they were in a race against the clock to stop. So that's not a good point to use either way, because the scenarios are completely different. The heroes had to PREPARE to fight The End before it became able to do anything, whereas Solaris had them scrounging up a means to fight AS it was trying to do what it wanted.

4: Unlike Solaris, The End actually IS immortal as it can reincarnate in another form later on, and said forms are just avatars it uses to do what it wants. Destroying its physical form does nothing but prevent it from actively destroying everything for a time. In other words, diverting it and buying time. Bragging =/= Lying, and I frankly hate Ian for injecting that idiotic notion into people's heads now.

5: The End explicitly needed power greater than the Super Form alone could give to actually be beat, the Chaos Emeralds + Cyber Corruption, and was able to outright overpower and depower Super Sonic 2 an ENHANCED Super Sonic, something Solaris straight up could not do period despite his supposed "superior" power to a BASE Super Form. People forget that not only are Super Sonic, Super Shadow, and Super Silver all powered by the SINGULAR SET of Chaos Emeralds, if even that considering Sonic needed to share the power with them, but also that the fight with Solaris was a 3 vs 3 situation. Three Super Hedgehogs fighting three separate Solaris' controlled by a singular consciousness. Not 3 beings ganging up on 1 entity, which The End trumps Solaris in anyway due to outmatching all 4 Titans, all of which NECESSITATED Super Sonic!

6: "Oh, but Solaris eats dimensions, The End couldn't break out of 1, all hail daddy Solaris!" A dimension able to contain infinite amounts of data, able to trap you unless you have NOTHING holding you down, and was implicitly walled off dimensionally to prevent outside forces from releasing The End. Not to mention The End was also sealed up inside of Supreme, who was also sealed up inside of Cyber Space which was blocked off the dimensional wall erected by the Rhea Island Towers. Also, by this logic, Solaris is stupid weak due to being split up by a small explosion and locked up inside of both a scepter and 7 year old girl and incapable of breaking out of them or just instantly re-merging right then and there after being split. That's also not mentioning that The End is able to FREELY travel between dimensions and was implicitly incapable of that due to the seals in the Titans and Rhea Towers, all of which were IMPLICITLY designed to do just that.

So, yeah, The End.