Here's a quick video guys showcasing all pokeballs and damage resistance and weakness table for all Pokemon types. This can be useful when battling in gyms :) https://youtu.be/1dTwbXFYm2s
Edit: the pokeballs are all the ones that are currently known to exist throughout the entire series of Pokemon. It's just something visually interesting for you guys to see.
Mew and other legendary birds are thought to be in Pokemon go there in the code, possibly a future update release.
The damage resistance and weakness chart in the video is sort of the best one I've seen it not only shows you the weakness and resistance but gives you the values too such as x2 damage etc... Many of you guys say this is knowledge allready known, not necessarily there are many different types to remember.
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[url=https://s.yimg.com/lo/api/res/1.2/vgRigLuXs1OcgrxVInAuYQ--/YXBwaWQ9eWlzZWFyY2g7Zmk9Zml0O2dlPTAwNjYwMDtncz0wMEEzMDA7aD00MDA7dz02MTU-/http://images.nintendolife.com/news/2013/11/weirdness_this_chart_and_range_of_tips_may_help_with_those_confusing_pokemon_weaknesses_in_x_and_y/attachment/2/original.jpg.cf.jpg]Or just google a picture like this if you don't understand it yet[/url]