Main Series Games:
* Pokémon Ruby & Sapphire (First appearance)
* Pokémon Emerald
* Pokémon FireRed & LeafGreen (via trading)
* Pokémon Diamond & Pearl (via trading)
* Pokémon Platinum (via trading)
* Pokémon HeartGold & SoulSilver (via trading)
* Pokémon Black & White 2 (via Pokémon Dream World)
* Pokémon Omega Ruby & Alpha Sapphire
* Pokémon Sun & Moon (via Poké Transporter)
* Pokémon Ultra Sun & Ultra Moon (via Poké Transporter)
* Pokémon Let's Go, Pikachu & Let's Go, Eevee (via Pokémon Go)
* Pokémon Sword & Shield (via Pokémon Home)
* Pokémon Brilliant Diamond & Shining Pearl (via trading)
* Pokémon Legends: Arceus (via trading)
* Pokémon Scarlet & Violet (via trading)
Other Games:
* Pokémon Mystery Dungeon: Explorers of Time, Explorers of Darkness, and Explorers of Sky
* Pokémon Ranger
* Pokémon Battle Revolution
* Pokémon Rumble Blast
* Pokémon Super Mystery Dungeon
* Pokémon GO (as a raid boss and event Pokémon)
You can obtain Blaziken in most of these games by trading or breeding, as it is not typically found in the wild.