Treecko is Hoenn. Definite want.
Charmander is the original Fire. I will be likely using it in Fire Red (I tend to start with Fire), but it saves me breeding and importing a baby, so sure.
Totodile...well, do you have a Squirtle? I am trying to get Totodile and Chikorita on SS so I can complete that Pokédex, then import them. I know I have a pending trade that includes a Mudkip, so we can scratch that. Though if Squirtle is not an option, since Mudkip is in play already, Totodile will be acceptable (again, saves me importing them, so why not?).