In the process, Leicester inflicted a first defeat of the season on the Tangerines.
Leicester manager Pearson said: "I've never questioned if Matty Fryatt can do it at this level, but I've never had any doubts he can score at any level.
"You get less chances the higher you go, so two goals from him today speak for themselves."
Fryatt's first arrived after 25 minutes when a quick free-kick from Richie Wellens allowed the striker to spring the offside trap and slide the ball home from 14 yards.
Before that Blackpool had gone close when a Ben Burgess drive from 12 yards struck a post, with Chris Weale recovering quickly to block Jason Euell's follow-up shot.
The Seasiders were level after 31 minutes when Charlie Adam seized on Wayne Brown's weak back-pass and slotted in.
City almost recaptured the lead just before the break when Matt Oakley's free-kick from 22 yards hit a post.
The Foxes' winner arrived after 58 minutes when a mistake by Rob Edwards allowed Fryatt to hammer a left-footed shot into the net from 15 yards.
Pearson said: "I'm delighted with the win, this was a potential banana skin because they've had a decent start to the season.
"You have to make sure if you are not at your very best you are still winning games, and I think that was the case today."
Pearson had special praise for his midfielders.
He said: "Richie Wellens brings that bit of creativity while Matt Oakley is going to be a big influence again this season and Andy King did very well when he went on."
Blackpool boss Ian Holloway was critical of his defence.
Holloway said: "I felt we didn't pass the ball as well as we have been doing. We started well, then lost our shape.
"The two goals we conceded were very poor. The first goal was a schoolboy error, we should have been more switched on.
"The second was a long ball from their 'keeper, our centre-half spewed it and Matty Fryatt says 'Thank you very much'."