Is this a good pokemon team for Pokemon Blue?

This is an awesome team! These are also nice changes to improve your team: Delete Butterfree's Psybeam since you already have some Psychic moves with Haunter. Might as well change it into a flying-type move. Use Ice Beam for Wartortle's 3rd move because it has more PP, also a strong move and a higher accuracy than Blizzard. Maybe let Pikachu learn Shock Wave. Remove Sandslash's Rock Slide and change it into Body Slam. I don't really play Red and Blue, though. So, I don't really know the moves the Pokemon can learn there. But I love FR and LG. Still hope I helped! :)