1. Blast Burn: Blast Burn is Charizard's most powerful Fire-type move, which deals massive damage. It has a base power of 150 and a high critical hit ratio. Blast Burn is especially effective against Grass and Ice types, which commonly threaten Charizard.
2. Heat Wave: Heatwave is another powerful Fire-type move that hits all opponents in a double or triple battle. It has a base power of 95 and a chance to burn the target. This effect can be particularly useful in wearing down opponents and forcing them to switch out.
3. Overheat: Overheat is a high-damage Fire-type move with a base power of 130, but it comes with a drawback. After using Overheat, Charizard's special attack stat is reduced by two stages, making it less effective in subsequent special attacks. However, its sheer power makes it worthwhile in certain situations, especially when you need to take out a tough opponent quickly.
4. Flare Blitz: Flare Blitz is a dual-type Fire and Fighting-type move with a base power of 120. Not only does it deal significant damage, but it also makes contact with the target, giving Charizard a chance to inflict a burn or flinch. The fighting type also helps Charizard to cover its weakness against rock type Pokemon.
Overall, this moveset provides Charizard with a diverse range of powerful Fire-type options, allowing it to deal with various opponents and situations. Blast Burn and Heat Wave cover the Fire-type STAB (Same Type Attack Bonus) while Overheat serves as a high-risk, high reward option. Flare Blitz adds coverage and a chance for an additional effect.