I want a Tsareena, but I need to get a Bounsweet first.
You can trade with some rising star guy named Kihei in the Pokémon Center right before Brooklet Hill, but he nicknames it Bouncee lmaoo.
Bounsweet is a rare encounter in the Lush Jungle. It may be found in other places, but I haven't found any more info. Hope I helped!
I know how! Akala Island. Route 5 Poke center. Man asks you for lilipup for bounsweet! BOOM! You have a bounsweet. (lilipup is in route 5)
To find bounsweet, just follow these steps:
Hope it helped and good luck!