It's the Leaf Village culture festival, and Lee is convinced Sai wants to stand out more.  Poor Sai... The “Mr. Leaf Village” contest is just around the corner – Can Lee win a pair of ticket's to the village's swankiest restaurant?
I'd prefer you say "sneak" in.
Preferiría que dijeras 
"espiando" a los demás.
Preferiría que dijeses 
"espiando" a los demás.
Prefiro dizer que nós "entramos de fininho".