Ep.18 (Aopulco Vacation- there's a script somewhere, an old sub, otherwise, I haven't seen anything.
Ep.35 (Legend of Miniryu) - there's subs floating around, I don't know who by.
Ep.38 (Computer Warrior Porygon) - Excal subbed it, if you can find it.
The other eps that weren't dubbed (252 - The Icy Cave and AG120 - Satoshi and Haruka! Heated Battles in Hoenn) aren't subbed either.
The Whiscash episode that would have been AG101 was never aired, not even in Japan. We're lucky the preview aired by accident somewhere (TV Osaka?) and was capped. :/
Yadoking's Day... #PocketMonsters subbed that. (I'd like to do my own sub of it eventually.)
I have all of these that can be had, but none of them are subtitled.