They're absolutely retarded for not putting the Pokemon games on mobile still. You'd have to pay me to own a 3DS, but if heartgold was on the play store I'd pay money to have it on my phone. What's more popular as a device for god sake, Android/iOS phones or 3DS's? The answer is obvious. I've literally only seen a 3DS on display at GAME stores. Never seen anyone who actually owns one.
EDIT: Still looking for Pokemon Catch em All Leaf Green hacked ROM if anyone knows where to find a download.
I own a 3DS and I know a few people who do as well, so your lack of seeing 3DS owners must be a UK thing. *shrugs*
As far as your ROM goes,
No Warez Posting links to, requesting or discussing illegally obtained or pirated materials; such as games, software or other media
Pretty sure you've been around long enough to know that.