Police Academy 3: Back in Training (1986)

Ash: Hey Mom! Can i Catch Reshiram?

Mom: No. You can't because they are so hard to catch and you don't have enough ultra balls.

Ash: WAAAAAAAAAAAAAAAAAAAAHHHHHHHHHHHHHHH! I WANT TO CATCH A LEGENDARY POKEMON!!!!!!

Mom: Go to the Pokemall and buy lots of ultra balls