1000 ways to get kicked out a Pokémon Center

937.

Throw out your Waillord inside.

938

Bringing in politoad and activating the drizzle ability

939. Lead a swarm of Clefairy in a Metronome session.

940 let loose a swarm of Beedrill

941.

Let your Garbodor run loose

942. Stand just inside the door with a Xatu and tell each trainer that passes that you predict they're going to heal their Pokemon.

943 - bring a Skitty & Wailord inside and watch em go wild.

944. Walk up to Nurse Joy and before she has a chance to speak, say: "Hello, and welcome to the Pokémon Center. We restore your tired Pokémon to full health. Would you like to rest your Pokémon? Okay, I'll take your Pokémon for a few seconds. Thank you for waiting. We've restored your Pokémon to full health. We hope to see you again!"

If she then tries to say something, repeat everything. And keep repeating everything.

945. Diglett Dig, Diglett Dig, TRIO TRIO TRIO.

...you know what that sound heralds. And even if it doesn't herald what you think it does, just having it around for longer than five minutes would be enough to do the job.

946. Forgetting to bring repels when you're near Victory Road and constantly attracting the annoying Golbats and the self destructing Gravelers.

947. Keep throwing balls at other trainer's Pokemon as they come into the center, just to see if they can keep blocking them and always say "Don't be a thief!" when you do.

948. Going into the Pokecenter saying you need medical help when your bag is overflowing with potions and revives.

949. Releasing a Seviper and a Zangoose in the front lobby

950. Insisting that YOU are Nurse Joy

951. Block the door with Snorlax and confiscate all Pokeflutes in the immediate vicinity

952. Teach your Chatot this song and have her sing it whenever anybody enters the Pokémon Center.

953. Publish a book called "1000 ways to get kicked out of a Pokemon Center" and set up a store to sell copies in the lobby.

954.

Let a Koffing and Grimer out of their pokeballs to stink up the place.

955. Paint the PokéCenter's roof blue and the PokéMart's logo on the front to confuse everyone.

956.

Trying to grab more the 6 Pokemon and breaking the PC.