Was a awesome update to the Red/ Blue versions in how it brought Jessie and James Team Rocket from the anime and brought them into the game. Also who didn't love how Pikachu would follow you around and tell you how he felt?
I like the fact that Niantic is updating this app regularly, but after reaching level 22, I have become fatigued with the game. This game is a mega grind. I can't deal with catching any more pidgeys, drowzees, ratattas etc. Because of this despite the new buddy system I have not played the game for weeks. I think that the plus device will make the game much more bearable to play regularly, but having to pay £34.99 to make a game merely bearable is ridiculous. Perhaps the next generation of Pokemon will revitalise the experience, but I'm not holding my breath.
i was perma banned on my account after buying about 700 usd in expantions, items, and playing for months. i was perma banned for "hacking" all cuz i was a passanger in a car and flew to WI to say hi to family when i live in oregon for the holidays. amazing how bad niantic is..
in GB/GBC/GBA 
you can literally just download this free on nintendo eshop!