If a Pokemon with Prankster uses Assist to call a move that has

>>32903785
Yes.

>>32903832
Do you have proof of that? that doesn't sound right.

>>32903785
No. The Assist had priority and was affected by Prankster, so anything that follows doesn't affect the dark type.

>>32905148
wouldn't that trigger people?

>>32905173
Wouldn't ANYTHING trigger people?

Besides, it's not as consistent as Copycat Roar prankster Riolu. Unless you only had another pokemon in your party with negative priority moves, you'd eventually get something else.