Here are some of my pokemon that Ill trade you for the oblivia heatran. I want to give you something good since you are going through a lot of trouble for me.
Shiny Careful Lucario - (Inner Focus)
31/31/31/X/31/31 (244 HP/236 SpDef/28 Speed) with egg move follow me!
Shiny Adamant Kingdra - (Swift Swim)
31/31/31/X/30/31 (252 Att/ 252 Speed)
Shiny Brave Gigalith - (Sturdy)
31/31/31/x/31/0 with egg move Gravity
Event Jolly Victini (Victory Star) Cherish Ball
31/31/31/x/31/31 (252Att/ 252 Speed)
with V-create/Fusion Flare/Fusion Bolt/Brick Break
Event Timid Mewtwo (Pressure) Cherish ball
31/x/31/31/31/31 with Electro Ball
I have more, but these are the ones I thought you would be interested in.