Level Ball will not allow selection of a mon already on your board

Baraggan

Seen this multiple times. If you have, say, a Ralts or Gimmighoul in play and try to Level ball another, you can't click it when searching.

Mod_Skrilla

Hello Trainer, I recommend you open a ticket with the support team for this instance. To do so, please visit https://support.pokemon.com/ and then click the Pokémon Trading Card Game Live link. From there click "Contact Us"