I've beaten R&CF a whole bunch of times now, but every time I get over 500 million bolts, it sends me back to around 470 million. While this isn't a huge deal for me, because I have EVERYTHING in the game, it is kinda irritating to see a lot of hard work go to waste. Has anyone else had this problem?

i cant beat the pirate bot boss....

I haven't made it to 500 million. I quit playing after I reached around 320 mill.

 I had some problems there too. I think I beat him by using the mag-net launcher on the pirate dudes, and I used Mr. Zurkon on the electric ones at the end. Other than that, I just hammered him with everything I had. (starting with weaker weapons so that when I got his health down more, I could just pull out the judicator/ alpha disruptor and finish him.) and the Leech bomb is definitely your best friend.

Dam dude are you serious bro? Its sort of easy.. well it depends on the skill of a player. If you cant beat the pirate then you stand no chance against the final boss my friend.

I have passed 500 million a long time ago.

 well i think my problem is that i only have 102 health. I need to go back to the other levels and collect and upgrade everything. 

Do you upgrade your weapons? I suggest using the flamethrower or the rocket lock on weapon(dont remember name) I can beat that pirate with only him hitting me 1 time.