However, it still makes sense, I think. Technically, in that universe, Shark Tale can't exist, because Will Smith doesn't technically exist, his character sure, but not Will Smith as Will Smith.
Or how about the Hermione/Bellatrix in Gringotts scene?
That was Helena Bonham Carter pretending to be Emma Watson, pretending to be Helena Bonham Carter, pretending to be Hermione, pretending to be Bellatrix.
.
For those who don't know the reference: Julia Roberts plays Tess who then pretends to be Julia Roberts.
That was Helena Bonham Carter pretending to be Emma Watson, pretending to be Helena Bonham Carter, pretending to be Hermione, pretending to be Bellatrix.