Well Toon Force and 4th wall breaking should be obvious considering the kind of cartoon Family Guy is. And with its cutaway hax (I dont know what that would be).
Regenerationn, he should have it I think because of their cutaways. In one cutscene stewie either gets stabbed, burned, incinerated, even killed and then after that he is completely fine. And since these are past accurences they should be taken seriously given they happen literally every episode of Family Guy ever. It might even be Invulnerability to an extent.
Telekinesis and Mind Manipulation should come from when he and the Griffins all had Super Powers and Stewie's overgrown brain gave him telekinetic and mind hax.
And there's more I think he should have:
He should have Reincarnation Manipulation because when stewie created the Universe he explained to Brian that through a "Temporal Casuality Loop, the universe created me so that I could create it, so it could create me and so on" for infinity. It might be Casuality Manipulation, im not sure, But I still think he should get something from this.
Stewie should also get all of Darth Vaders abilities given he has been Darth Vader for 3 Star-Wars Family Guy specials.
Stewie should also get cloning via machinery as he had inventions that could create Evil Stewie, "Bitch Stewie" and "Bitch Brian" and also clones of both when they went to Las Vegas.
IDK about this one but Stewie should get resistance to Time Manipulation as when his Time Machine pushed Time Backward, he and brian were unaffected by its effects for some time.
Stewie might also be Acasual via his time machine because even though Bertram killed Leonaro De Vinci, one of Stewie's ancestors, Stewie didnt die or be erased from existence. And stewie specifically explained that since he "created the universe", Bertram killing De Vinci would prevent Stewie's birth, which would prevent stewie from being sent outside of Time-Space in order to create it, therefore making the universe "non-existent".
Finally, Stewie's durability should be far higher than human level as when he and brian both entered and left the universe, Stewie explained that beaming them back into reality could be extremely dangerous and could kill them. But both survived the whole process just fine.
Agree/Disagree?