If this is in generation 3 or 4, you can't get it at all, because hidden abilities are only available in gen 5. Starters are not in dream world, they were given out at an event really early with their hidden abilities. As for baton pass, you have to breed it onto blaziken, on gen 4 and gen 5 only.
To breed it, get a male Pokémon that knows baton pass. Get a female blaziken with speed boost (have to hack if you didn't get the event). Make sure the baton male is in the same egg group, Pokémon include eevee and its evolutions, sentret, furret, aipom, ambipom, girafarig, mawile, buneary and lopunny. Finally, put them in the daycare, get the egg, hatch it and get lucky (might need to breed multiple times to get speed boost.
Hope this helps!