If I’m fighting against Rowlet using Charizard. Then yes. Charizard is a fully evolved Fire Type fighting a base form Grass Type. Rowlet’s Flying Type doesn’t help with Rowlet’s weakness against Flying Types, which Charizard also has.
I dont have a least favourite Pokémon (galarain meowth annoys me a little) so ill say that an Inteleon is definitley going to punt a galarian meowth into the stratosphere.