unless you have the TM or are making another eggbthen no
you can't i tried trust me. if you did delete your saved file and you had a Pokemon in the walker it will be there until the battery dies get a new one.
I am pretty sure you have to trade it and it evolves after being traded.You have to trade it with another heartgold/soulsilver and trade it back to be able to have machamp on your game.
After beating the story and obtaining the National Pokedex. Go to Route 15 in Pokemon Black to the Pokemon Shifter Building. Connect a second DS running Heartgold. There you will be able to transfer up to 6 Pokemon from Heartgold to Black/White. Make sure the Pokemon transfering have no items and do not know HM moves(Cut, Surf, Flash, ect) You can not trade or transfer from Black/White back to Heartgold.
there is no cheat, i know even though i have heartgold once you delete a file you cant get ano ther back.
You cannot. Once in Black/White it cannot be sent back
You cant
No, there is no possible way to get your Pokémon back that is in your Pokéwalker if you have started a new game in Pokémon HeartGold or SoulSilver.
you have to go back to your moms house
it wil never come back...
No. It will, however, bring some usually uncatchable old ones back.
yes you can. you can fly back to the indigo plateau and then you can enter the Pokemon leagues again.
to battle Blue in Pokemon Heartgold you must defeat the 7th gym leader, then find him on cinnabar island. Talk to him, then he will go back to his gym for you to fight