He's still going, his stat increments have just started to decline, though. Sadly, he dislikes battle. Hopefully I can keep him going long enough to get a lot more up in his stats.
FYI, he is able to get Claw Combo (the final technique in the Slash Claw tech. chain), I'm putting it off until later, though. I will keep battling with him (especially when his stat gains get much lower, as battle can give huge boosts), despite the fact he 'dislikes battle' (HE LIEKS IT, HE JUST DOESN'T KNOW IT YET).
Oh, and yes, this is a POW based Kato. The only training I did for INT directly was to get it from around 180 to 200. In his early days. I felt like putting everything up a level.
As for whether I would go for a POW based Kato again, I would definitely say yes, as it is DEFINITELY worth it. Phantom Claw, for example, does well over 100 damage. S Hit%.
Amphy's Gaboo will prove to be a challenge for this fella, though.