The front right side is so stiff it won't move if I push down on the car. What could be the cause?

 

First guess would be a bent or frozen (rusted) strut (shock insert).

 

the left side isn't stiff enough? j/k

it has to be a shock problem.

 

+1... almost the only thing it could be... unless the spring had collapsed to the point where the car was already at full travel downward on that side, but that would be both a) highly unlikely, and 2) very visible.

An insanely high spring rate could be that stiff, but it wouldn't happen by itself.

 

ive seen seized up cheapie struts before...

 

Definitely a bad shock.

 

The problem is your puny arms girly man! Go to the gym for a month, then you can ask the question again.

it's most likely a frozen or bent shock

 

Better than what I was going to recommend. Soak the whole right side in PB Blaster and call me in the morning. Just kidding!