Ν | Pokémon Black/White (J) Glitch - Raimon/Nimbasa Gym glitch @N_i_ | Uploaded March 2011 | Updated October 2024, 3 hours ago.
If you lose the battle against Lady Colette (おじょうさまの コレット) in Raimon City (ライモンシティ), and come back, she will be in two places at same time, one being uninteractable. This glitch has been fixed in the newer releases of Black/White.