You're not actually that far off of what I've got planned, I won't go into detail but Magma WILL be there and Groudon WILL be helping!
I'd still like to hear your idea though, it might spark some inspiration even if I can't use it!
so we all know that heatran it’s gonna be a futa so darling, the breeding thing with her in the MC at the MC trying to pick a member to use she asked for a request because she had dreams about something. She asked the MC to turn his dick into heatran dick put it in simple words the MC would be breeding her with her own dick and she always kind of want to be Bread or fucked with her own dick