Here's why:
* Fire Blast is a move learned at a higher level. Red Rescue Team has a level cap of 99, and Fire Blast is typically learned at levels beyond that cap.
* Movepool Limitations: The Pokemon available in Red Rescue Team have limited movepools compared to later games. Fire Blast simply isn't within the movepool of any Pokemon in this game.
What to do instead:
* Focus on other Fire-type moves: Charmander, Cyndaquil, and other Fire-type Pokemon can learn strong moves like Flamethrower, Ember, and Quick Attack.
* Explore the full movepool: Experiment with various moves to find what works best for your team and playstyle.
If you're looking for a game with a higher level cap and access to Fire Blast, you might want to consider exploring Pokemon Mystery Dungeon: Explorers of Time, Explorers of Darkness, or Explorers of Sky.