Pokemon Mega Power is a custom game made by fan developers. You can freely get it online to test out. Physical cartridge and optional custom case are available here.
New regions- Ivara, Lande, Sevii Islands All mega evolutions Some gen 4, 5, 6 and 7 Pokemon
I play the rom on my phone but I wanted a hard copy for my SP, arrived a day early, saves, and it's just like my phone, I am not a bot or troll I truly did purchase and plan on getting Pokémon Orange Island