This scene from RELOAD chapter 5 pretty much sums up the group's feelings about Sanzo.
Goku: If these guys are after us, maybe Sanzo's also [got]...
Hakkai: A FAKE Sanzo...?!
All three: I WANNA BEAT THE CRAP OUT OF IT...!!
(All three run off towards the inn.)
- Even better, this revelation takes place in the middle of a fight with their own duplicates, who stand there totally bewildered when their enemies suddenly lose interest and run off.
- In the same story arc, real!Sanzo saves fake!Sanzo from real!Gojyo...just because he's not letting ANYONE who looks like him get their ass kicked by the cockroach.