Your question cannot be answered with the information currently available.
"More Famous" is too idiomatic to provide an adequate answer without poll data from various areas & age groups, perhaps even from different socio economic groups.
Without any data of this sort there is no way to really determine which person is more widely known to the general populace therefore any answer would really be speculation, opinion and/or conjecture from the individual who answered.
Sponge bob is more famous than Peter Pan
sonic the hedgehog.
Both are equally famous, although Peter Pan is more famous than Darth Vader
Peter Pan, don't know the other one
Joker
Mickey
Peter Pan is more famous than Lady Gaga, although she is very well known herself.
I would have to say Mario
Lil Wayne
depends were you are and what you watch but i suppose peter pan is more famous because its older and also films for older kids have been made, so it has a bigger audience, hope that helps
Sponge bob like duuuhhh
Peter Pan Ice Cream.