Pokémon Contest! Hajitsuge Convention! - S7-E10
Factual error: During the battle with Team Rocket, Beautifly uses Tackle. However, it was unable to learn it until Generation VIII. This episode, a Generation III episode, would mean that at this point in time, Beautifly was unable to learn it by any means. (00:19:57)
Suggested correction: Differences between anime and games are not mistakes.