
Originally Posted by
TwisT
Just a thought. If Obito was Tobi back when he fought the 4th, his size was a full grown man. But when he got crushed they had the size of Naruto & Co back at the chunnin exam (maybe slightly bigger). This could indicate a time gap of 5 years+. That is basically Narutos entire progress. If that is so then there would be no mystery how he became as powerful to fight the 4th.
But the possibility of Tobi being someone else back then is still open. And Zombie-Madara mentioned something like he knew who Tobi was didn't he (don't really remember if he actually said it or i just remember wrong)? If so Madara might have been Tobi back then. And rescued Obito and taught him some Uchiha skills and history and then died or being killed and Obito took over as Tobi. Also Obito claims that he gave Nagato the Rinnegan. And we know the Rinnegan comes from the Sharingan. And the only one to have achieved that transformation so far is Madara. After all Tobi has one of his eyes and and Kakashi has the other. So it could be that when Madara-Tobi died Obito-Tobi took his eyes and then gave them to Nagato.
Just food for thought now that someone raised the idea of past and present Tobi might have been two different people.