No, I know that. In fact, Size Matters is still PSP only (unless you were lucky when it was available on Vita a few weeks ago during that little mishap). They really should have a PS3 version, just so the collection can truly be complete on one system (not counting the new PS4 Ratchet and Clank remake. Actually, there is technically one more R&C game that I forgot. Not sure it counts though. It was a cellphone sidescroller called Ratchet and Clank: Going Mobile.
On a side note, I wonder, with the remake, if they will use the voice of James Arnold Taylor (he's been in every Ratchet game but the first) to replace the already recorded work of Mikey Kelly (the original voice of Ratchet).