so i have 75pt experienced big barda, and then vet 145pt mister miracle. if i add a feat of 5 points or more to mister miracle, does that make him eligible to use sidekick?

No.
From the FAQ:
"Q: Do the points from a feat card that states “choose a character” add to that character’s overall point value?
A: No. The points for feat cards add to the overall force build total but not to any characters point value."

darn. ok i guess its rookie barda who will see play then lol. thanx man