I'd LOVE to see Butterfree again!
The whole gender thing would be um interesting...though Pink Male Pokemon are not unheard of remember the island of Pink Pokemon back in the Orange League Saga? Though personality I always through Ash's Butterfree was a male.
The debate about the scarf...well I mean all of this time since its been gone (no telling if it has been "years" since the anime isn't really specific on anything like that anymore they say months, weeks, annual for different events, tournament, contests, etc. but still) would you really expect it to keep wearing it THAT long?
I'm more curious to what all of this Kanto throwback is for. Don't get me wrong I'm loving it first Charizard, the numerous flashbacks in that episode and now this?
Either the writers are FINALLY giving us older fans something good by throwing back to make up for this crapping saga or it is something bigger.
Could this hint at a new character in Gen 6? Just to add closure to Ash's run in the series by going back to his old Pokemon? Just a thought.
All they need is Primeape and Pidgeot. If they show Ash traveling back to Kanto then I wouldn't be surprised if he saw it if he traveled through the forest her left it in.