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Using FR/LG tiles (which are in Essentials) or replacing them comes down to personal preference.
And yes, there are still some fangames made with that tileset or with Gen 3 styled custom tiles, which have some very appealing maps.
There are games that are still using FRGL tilesets. Although I personally prefer gen 4 with gen5 tilesets I think of them as more beautiful in "palette". I think you should've made this as an discussion since I know some people that like FRLG tilesets.
I'm afraid it does not exist. You will have to create them yourself, using the Editor.
Besides default moves animations that come with Essentials, I can only think about Roby's animations pack which add some custom mades animations.