How can you get all Hoenn starters in firered?

so here is what i did. i got one starter from ruby and i gave the starter over to my Pokemon Colosseum game. next i made a new game and got a new starter etc. then when i had all 3 in Colosseum, i gave them to fire red. but if you think ur profile on ruby/sapphire/emerald is too rare to give up for all starters u can just give the really good pokemon, either give them to a different game of just dont do it