Still an external source of power.
We're talking about characters with their own original powers.
- Minato is a close one but he loses to adult MS Obito.
- Kakashi has Obito's eyes so he doesn't count
- Hashirama is also a close one. Could go either way.
- MS Madara loses to obito
- MS sasuke also loses to obito
- Gai beats MS Obito
- Kaguya doesn't count.
1. Seriously doubt Minato loses to an adult Obito. He did get him with The Flying Thunder God in the war. He could have just as easily slit his throat and the marking never dissappear. Plot saved him.
2. Yeah kakashi don't count.
3. It really depends on the situation with Hashirama.
4. We don't know how strong MS Madara was so we can't really say.
5. Yeah obito is stronger.
6. Yeah gai wins this.
Obito does have hashirama's cells so that shouldn't count.