List of all opponent held Items?

[chippy]

HI! I'm thinking about doing another playthrough of the game with Magician Fenniken as my starter. Is there a resource with information on enemy trainer held items? Does the player keep items stolen from enemy trainers with Magician / Thief after battles? 

[VMeemes]

I know the wiki would have something like that, and as for your question about stealing held items that answer is no. You can only steal held items from wild pokemon and never trainers (in-universe reason is that you give it back to them afterwards I think).