no! well actually, with cheats you can.
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Blaziken does NOT learn flamethrower. but torchiccan. at level 42 i think!
Blaziken cannot learn Flamethrower by leveling up but it can learn Flamethrower via the TM 35. Blaziken's pre-evolved form Torchic can learn Flamethrower at level 43.
what i learnd OS with my blaziken it learn sky uppercut at lvl 57but that is what i think
torchic can only fly when torchic evolves to blaziken and if you use brave bird,it is a flying&fire attack.its the most powerful attack of blaziken
Blaziken learns Sky Uppercut in level 67.