I have this amazing cheat to save on haedcore mode!!!!!!!
While on hardcore mode, put your psp on standby and back on again. It should say your memory stick had been ejected. Go onto options and it'll say "a memory stick has been found, want enable autosave?" Say yes and save. Keep on doing that to save.
:):):):)

These are six armors
That you have to mix-match.

Fire Bomb
Head Mega-Bomb
Body Mega-Bomb
Hands Wildfire
Boots Mega-Bomb

Shoch Crystal

Head Electroshock
Body Crystallix
Hands Crystallix
Boots Electroshock

Wildburst

Head Sludge Mk.9
Body Wildfire
Hands Wildfire
Boots Wildfire

Triple Wave

Head Wildfire
Body Electroshock
Hands Sludge Mk.9
Boots Electroshock

Ice 2

Head Crystallix
Body Hyperborean
Hands Hyperborean
Boots Hyperborean

Stalker

Head Wildfire
Body Chameleon
Hands SLudge Mk.9
Boots Chameleon

Wear all wild fire armour and also make fire foot prints

It may take a while but when you are on pokitaru, when you have to get on the waterboard to get to luna, there is an island with some crabs on it. Each crab gives you bolts, and the crabs don't stop coming or giving bolts to you!!

Hope I Helped!!!

Go to ratchet's dream level and get to a mirror hit it with your rench and wait for the birds to come there will be more then one it's great for getting exp.

To get easy cash just beat the game and go to challenge mode after you go to draemtime get your bolt multipler to x12 and go to dreamtime and destroy the boxes and houses on the beach then go thogh the portal and repeat. I got ryno in two hours of straght play.

Just do all the clank challenges in both planets and you'll get parts from the meagabomb suit. When equipped ,whenever you get hit it absorbs the power and transfers it to your wrench. Whenever it is full swing your wrench to use it.

In dreamtime,the birds that flies out the mirrors,thier not really doin that.
If you go behind it,you'll be able 2 walk through it.

To get the rino 4 in this game all you need to do is beat the game then enter chaleng mode then go to a vender and you will be abel to buy the rino 4
P.s it cost 9999000 bolts so be prepard I wasint and it took me forever to get it.