larfleeze Trade evolution (between regions)

[Debbihilyes]

Hi, I need help to solve a problem i have!! 
Right now i finished Hoenn region and i have a friend still in Kanto (He didn't finish it yet)
i traded him a poke from hoenn to evolve it .. but he couldnt trade it back to me even when he open the pc he can't drag it to the trade, do u have any solutions or the only option is that he should finish kanto and johto first !!

[Larfleeze]

Hi there!

 

I'd be more than happy to help you. What's the name of the other player and the pokemon in question?

 

Very Respectfully,

Larfleeze