You know what, sure, let's do this.

- [b]can't be killed by destroying replaceable robot bodies[/b]
So, he can't be killed by destroying his body, you'd have to kill all his bodies and then his AI which is Vishkar corporation's HQ, right? So to actually kill him, you'd have to break into one of the world's largest corporations, kill or incapacitate their huge numbers of security and then destroy the core, not even counting the Age of Ultron like challenge of finding every trace of his AI on the internet. As destroying the core is presumably happened during the Omnnic war and he's clearly still kicking. Not to mention the fact that every other character dies if you kill them, with the semi exception of Dva, but even then it's only a suit and she doesn't eject far.

- [b]rupture his power core[/b]
So destroying his body wouldn't rupture his power core? Would an oddly specific weakness.

- [s]massive[/s] [b]dirty bomb goes off[/b]
You said it could "destroy a small house and irradiate a city block", so it's on a level with Dva's Ult, which we'll address in a minute, with the addition of radiation which, as pointed out, has no real world cure and you mention it can't be healed.


- [b]he can control [b]exactly one[/b] other omnic[s]s[/s] or machine[s]s[/s][/b]
You say that like it's not overpowered. He can literally control other players "easily", as long as they use machinery or are omnics.

- [b]and his ult has no counterplay aside from staying away from him, just like D.va's ult[/b]
Maybe you haven't played much Overwatch but there are dozens of counterplays to D.va's ult. Reinhardt can use his shield or charge it, Lucio can Ult or boop it away, Zarya can bubble, Roadhog can hook it away. With radiation that ignores shields and armour and can't be healed, there's no  counterplay other than not be near it. It could potentially be hooked or booped, though you haven't mentioned the radius and that would still be death for whoever did the hooking or booping.

- [b]except for every healer using advanced [s]magic[/s] technology[/b]
Which you didn't mention or specify in your sheet, though you did mention that the radiation in the Ultimate is unhealable, which would lead one to assume it all is.

- [b]the ultimate is unhealable, like Ana's biotic grenade[/b].
Incorrect, Ana's grenade blocks healing for a very short time, it's not unhealable damage. It also doesn't bypass armour and shield.

- [b]In the game, HP, Armor, and Shields all serve the same purpose: you're alive until you lose your last point.[/b]
Well, not exactly. You're alive until you lose your last point of health, as armour and shield [i]always[/i] die first and all characters have some health under their shields and there's no canon hero who ignores either. You don't ever die from losing all your shields or armour as you'd always have a minimum of 1 HP underneath.

- [b]We are talking about the same game right? The one with a magic Buddhist robot[/b]
Who throws lazer balls and does healing

- [b]a talking gorilla[/b]
Who fires lazers or hulks out

- [b]a cyborg ninja[/b]
Who throws shurikens and uses a dangerous sword

- [b]and a girl with an APM of nearly 9000[/b]
This is sort of funny but doesn't really contribute anything to your point

- [b]a radioactive robot[/b]
Who ignores all defences, deals unhealable damage, controls other heroes, doesn't die when beaten and can go off like a bomb.

[u][i]One of these things is not like the others.[/i][/u]


- [b]I don't think I'm going too far off the reservation with a radioactive robot.[/b]
Yeah, here's where I assume you're intentionally missing my point. I made the point that your character is against what Overwatch's power levels stand for. All the heroes are on similar levels, though they obviously have different strengths. Rein will always beat Zennyatta in a physical confrontation but Zennyatta can heal and support his friends. None of them are glaringly more powerful than the others, if you accept that a man can be so good with a bow that he's at the level of Mecha pilot. But your character can kill anyone, control other heroes, ignores the main defence against damage and even if he was miraculously overcome, would just build a new body or reside in on the internet and/or Vishkar HQ.

- [b]Yeah I'm pretty curious about why this is. Honestly it makes the timeline completely screwy, since the Omnic Crisis was supposed to take [/b]place roughly 30 years before the setting of the game.
On this, at least, we agree. I don't quite get why the GMs have chosen to move back the timeline but they have and they are the GMs.

My overall point is that no hero is comparable to yours in terms of deadliness or the ability to survive, not the way you've written him. I get the sense from your writing and briefly looking at some of your other sheets that this is deliberate and, well, whatever floats your boat. But being in any sort of conflict with this character would be pretty much pointless for, say, Mcree or Tracer, which rather makes the roleplay a bit boring.