Dude their max stake in Squaresoft was 18.x % after 2001. After the 2003 merger they owned 9% of the company and that never prevented either Square nor Enix from releasing games for competing systems at the time.
There's no « console warring » involved just facts.
We know about Sony's involvement in 2001, we also know Squaresoft was releasing games for the Wonderswan during the PSone generation because they couldn't go anywhere else after poisoning the well with Nintendo in 1997. So exclusivity to Sony's system had more to do with the complex nature of Japanese companies relationships than airtight contracts with Sony preventing them from releasing any of their PSone/PS2 era games on anything but a Sony console (and i specify console because those games have been everywhere)
