If by 'fluffy' you mean the Pokemon flaafy, and not some other Pokemon that is unknown to me (of which there are few), it can be found in the following places at the following levels:
Route 42 -- Levels 15 +17
Route 43 -- Levels 15, 16 +17
you can get it by getting a pichichu in pearl trade it to heartgold
In Pokemon Heartgold or gold and soulsilver or silver you can find it in viridian forest.
You can't. SoulSilver Only, unfortunately.
Confusion isn't a TM.
black stone
flaffy doesnt evolve by level it evolves when you give it a thunder stone
You can not.
In Pokémon HeartGold, you can find the 3rd Gym Leader in Goldenrod City.
You cannot find Deoxys in HeartGold, or SoulSilver. You can only get Deoxys through trading or at a Pokemon Event.
No, you can not get registeel in HeartGold or SoulSilver. The only way to get it, is by trading
Groudon is unavailible in Pokemon heartgold trade from soulsilver to get groudon.
Mt.silver
trade
in safari
You cant!
no you can't
on the pokewalker