Recently I have been trying to prepare for the Kanto E4, and I wanted to get Rock Slide on my Electivire to make it a terror against Lorelei, but once I had gone to the Rock Slide move tutor in rock tunnel it said that he couldn't learn it and I had gone to pokemon Database, a database for everything pokemon, and in the Tms section it said that it can learn rock slide, so is it just an error?
Link to Electivire's page on Pokémon Database: https://pokemondb.net/pokedex/electivire
Screenshot of me trying to get Rock Slide on my Electivire: https://gyazo.com/085dd57c959909799f60b4e54a5052c8
