The closest thing to RPG Maker on the PS2 would be RPG Maker VX Ace which was released on the PlayStation Portable, and could be played on the PS2 with a PSP emulator. However, VX Ace was not specifically designed for the PS2.
Here's a breakdown of the RPG Maker series for clarity:
* RPG Maker 2000/2003: These are PC-based versions of the software.
* RPG Maker XP: This version saw a release on the PlayStation Portable.
* RPG Maker VX/VX Ace: These are also PC-based software, but VX Ace saw a release on the PSP.
* RPG Maker MV: This is the latest iteration, available on PC and Mac.
It's important to note that none of the above are specifically designed for the PS2. If you're looking to create RPGs on the PS2, you'll need to look into other tools and engines designed for that platform.