TOO WEAK
100
CGI made this actor a beanpole playing Steve Rogers in "The First Avenger", but a super serum got him buff in a hurry
Chris Evans
200
This title fry cook of Bikini Bottom fame had trouble lifting a barbell with 2 marshmallows as weights
Spongebob
300
On this sitcom, spindly Eric Forman fails miserably at kicking open Donna's door & is thrown backwards in defeat
That 70's Show
400
In a 2011 sequel in this film series, Greg shows moxie even though his older brother Rodrick rules 
Diary of a Wimpy Kid
500
Samuel L. Jackson plays the archvillain known by this alias in "Unbreakable"; he's supersmart but his bones are brittle
Mr. Glass