I'm thinking about restarting my pokemon blue, and I want this to be my final team. Can someone please rate it?
Charizard- Flamethrower/Fire Blast, Slash, Earthquake, Submission
Your moveset works, but you might want to add in Swords Dance instead of Submission for an extra attack boost so your Charizard can start sweeping away at your opponents. Submission will not really add any extra benefit besides an advantage against normal and rock type pokemon when you can easily counter rock types with Earthquake and Normal pokemon are not really serious threats to Charizard when you have good attacks like Flamethrower. I personally like flamethrower, but you might want to consider Fire Blast for the extra power with sacrificing PP and accuracy. Slash is good for the critical hits, but if you add Swords Dance, consider using Body Slam for a good normal attack with potential paralysis.
Nidoqueen- Earthquake, Rock Slide, Fire Blast, Body Slam
This moveset works. You might want to consider Blizzard or Thunderbolt instead of Rock Slide because if you need to defend against pesky ground only pokemon like Dugtrio that may use Earthquake, you can super effectively freeze them. You can also consider Thunderbolt for Water pokemon that can threaten your Nidoqueen.
Gyarados- Surf, Ice Beam, Strength/Thunderbolt, Fire Blast
Strength is a necessity in the game and it a decent physical attack, but I think thunderbolt should be considered because with your current moveset, you have nothing effective against other water type pokemon.
Exeggutor- Stomp/Double Edge/Leech Seed/Explosion, Mega Drain, Psychic, Sleep Powder
Why hypnosis? 60% accuracy is not good. Use Sleep Powder for a better 75% accuracy. I generally dislike Solar Beam and other 2 part moves because they leave you vulnerable to your opponent switching out to a fire pokemon while your Exeggutor is happily collecting sunlight and then frying your Exeggutor with Fire Blast or Flamethrower. Try Mega Drain isntead if you still want a grass type STAB attack with some healing ability. Double Edge can be effective if you don't mind recoil damage. Stomp can work for flinching, but it isn't a really powerful attack, so consider double edge if you want power. If you want to be annoying, you can use leech seed and sap your opponent's HP while they're asleep. If you want to cause a lot of damage, Explosion might be helpful too.
Electrode- Thunderbolt, Thunder Wave, Explosion, Light Screen/Reflect/Screech
Your move set is good. I would rather have Reflect instead of Light Screen because Electrode's defense stat is worse than its special, so physical attacks are a more serious threat that require more protection like Reflect. Screech (despite its not so great accuracy) can be considered if you really want to hurt your opponent with Explosion because Electrode does not have the best attack stat. If you want to maximally cause damage, Screech can help you.
Pidgeot- Substitute/Double Team/Mimic, Wing Attack, Double Edge, Agility
I dislike the 2 part moves like Hyper Beam and Razor Wind. Hyper Beam may be powerful, but it will leave you completely open to switching. If you want a strong normal attack, consider Double Edge instead of Razor Wind.