Sometimes, the regular pinatas will be replaced by a giant one that is very easy to hit. Your only orders are for Pikachu to go to town on it. This doubles as stress relief.
Shocking Haunter before it scares the Poliwag.
Getting the cannon to go off in the Daring Days Cobalt Coast is fiddly to get across to Pikachu, but darn awesome once it happens, especially since it unburies all the treasure. "Pikachu's ears are still ringing!"