10 Strongest Forms Of Wolverine
1. Phoenix Wolverine
The Phoenix Force is most commonly associated with Jean Grey, as she was its target on more than one occasion. Throughout the Marvel Universe, the Phoenix Force is well-known as one of the most powerful entities, but it can't always have Jean, so it has taken on other hosts from time to time.
Long after Jean Grey and her ilk had died, many eons in the future, the Phoenix Force remained, but it wasn't alone. In an issue of Thor, the present-day manifestation of Thor Odinson and one involving Old King Thor and his granddaughters in the far future saw what became of the Phoenix Force.
Old King Thor begins investigating what appears to be the death of all life in the universe, and as he's conducting his search, he comes across something he never expected to find at the end of space and time: Wolverine.
Of course, it's not just Wolverine; it's Wolverine, the Final Host of the Phoenix Force. The character wasn't examined deeply, so there isn't a lot known about his strength or power levels other than the fact that he may be the last living thing in the Universe, and he's paired with one of the most powerful cosmic beings in the Marvel Universe.
We may not know much, but it still seems set in stone that Phoenix Wolverine is easily the strongest Wolverine of all.