Blast Burn inflicts damage and then forces the user to recharge during the next turn. Unless this attack misses, the user will always have to recharge.
In Black and White, the Move Tutor that can teach Blast Burn appears in a house on Route 13, and will teach it to all five fully evolved Template:Type2 starters.
Blaziken releases a powerful and massive stream of fire from its mouth at the opponent, or Blaziken holds out its arms and releases a powerful stream of fire from the fire around its wrists at the opponent.
Mew, though repeatedly said on the Pokédex to be able to learn any move, is not able to learn Blast Burn because the tutors only want to teach it to Fire-type starter Pokémon.
Blast Burn is the only variant of Hyper Beam not to be used in the anime.