cosmicexplorer
pewpewpew
Let's be clear on the difference between a "counter" and a "check."
Blaziken checks the same things as Infernape, except for those very specific examples you gave. Blaziken is always a better sweeper; Infernape does Choice Scarf/revenge sets and leading better.
Infernape does not counter these pokemon, it forces them out so that they can switch to something that can threaten Infernape. Blaziken doesn't need to switch in on anything that even mildly threatens it; for example, it can switch in on a Choice-Locked Scizor Bullet Punch, KO and get the speed boost, then sweep. Infernape's lower speed means it can't do that. Unless you're using Choice Scarf Infernape, you shouldn't be trying to take out any sweepers. And as for what Blaziken forces out, let's see about that:A Counter must be able to both switch into the Pokémon it's supposed to counter, with little to no risk to itself, and also pose an immediate threat to said Pokémon
Mixken KOs Swampert with HP Grass, LO Hi Jump Kick does ~80% to Machamp (how does Infernape beat Machamp anyway?), nothing forces Cress out besides TTar and maybe Gengar, and nothing forces out Breloom behind a sub. Period.Swampert? No.
Machamp? No.
Cresselia? Hell No.
Breloom? Not behind a sub
Blaziken checks the same things as Infernape, except for those very specific examples you gave. Blaziken is always a better sweeper; Infernape does Choice Scarf/revenge sets and leading better.