While you can't play the official Tekken 6 on a PS2, you have several high-quality alternatives for the console and modern platforms:
Okay, let’s be real. This is the arcade version. tekken 6 on ps2
The most common reason gamers look for Tekken 6 on PS2 is that they are remembering its predecessor. (released in 2005) is widely considered one of the best fighting games on the PS2. While you can't play the official Tekken 6