Easy Pokemon...
	Golden Medal...
	Note button in AR Viewer...
	Stickers...

A new pokemon can be obtained once a day via spot pass. If you change the date on the 3ds when you go back into the game you get the message that a new pokemon has arrived. Do this indefinitely to catch 'em all.

Medal	How to unlock
Golden medal on AR sticker menu	Collect all AR stickers
Golden medal on photo sticker menu	Collect all Photo sticker
Golden medal on pokedex menu	Collect all pokemon

Collect 30 stickers by scanning AR Codes and taking pictures of Pokemon in the AR Viewer.

Sticker	How to unlock
10 Pokemon simultaneously in the AR Viewer	Collect 200 Stickers.
11 Pokemon simultaneously in the AR Viewer	Collect 250 Stickers.
9 Pokemon simultaneously in the AR Viewer	Collect 70 Stickers.
12 Pokemon simultaneously in the AR Viewer	Collect 328 Stickers.
An image as a backgroud	Collect 50 Stickers.
Note Button	Collect 30 stickers.
Slider Scale	Collect 100 Stickers.
Stopwatch Button	Collect 150 Stickers.