Caught Nuclear Actan but not found in PC?

[Lord Windos]

As far as I know, as of the recent version of the game, you can't own a Nuclear Actan. You can catch it, but you won't find it in your PC because the devs vetoed the idea, due to the fact that, catching a Nuclear Actan, when the cutscene after the battle shows that you just beat it up and it purges the radiation from its body, is kind of incongruous.

If you are willing to unpatch your game to its base state, and can navigate/survive some of the game breaking bugs that are present there in, you can catch and keep it, and update the game and still have it, but I don't recommend it for obvious reasons...