get all skill points and then u unlock it. this is the normal method. the cheating method is to set your psp to 2:55 am and go to the secret area in metalis (if you need help check a guide). go to the teleporter and if its 3:00 am you can enter the treehouse
Ratchet and Clank size matters have no cheats
No you can't
If you mean "How do you get to the HIG Treehouse in Ratchet and Clank Size Matters and Secret Agent Clank, consult the Ratchet and clank wiki.
Ratchet and Clank Size Matters - 2007 VG is rated/received certificates of: Australia:PG
No
Size Matters and Secret Agent Clank
You have to have to comple all clank challenges on meltalis and dayni moon ratchet and clank is Awsome
You explore Lavaland and you will evenually find Clank there.
yes. I have ratchet and clank size matters and its amazing
None
yes
look at cheatcc