William Shakespeare is more famous.
Although it's a very unfair comparison since one is a celebrated playwright who lived hundreds of years ago and one is a fictional character from the early nineties.
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.
sonic been around alot longer decades not a few just a few yrs
Sonic the hedge hog Rules
Pokemon is the second largest selling video game of all time, second only to Mario. So, that being said I would have to say Pikachu is definitely more famous.
Since nobody talks about Elizabeth Taylor anymore, Sonic the Hedgehog is more famous.
Sonic
Sonic the hedgehog
sonic the hedgehog
Sonic The Hedgehog
I would say Sonic. Because 'Pokemon' are like new isn't it?
That is an opinionated question, but since Pikachu is the primary mascot of pokemon, and Shadow is a secondary mascot (Sonic is obviously the primary) I'm going to have to say Pikachu.
pikachu is more famous
in japan pikachu is more famous
Pikachu
Mario considering he was made before Pokemon and Pikachu. .
Pikachu
Pikachu
pikachu
pikachu
pikachu
sonic is far more famous