There's a Celestia at the bottom near some fruit
Rainbow Dash is inside a vase in the middle
Derpy is near a guy that's dropping something at the top
Lyra is at the top-left, sitting on a bench
Trixie is staring at the bottom-right
Pinkie Pie is going to shout foreverrrr at the right-middle
Angel is at the top-right on top of a wooden plate
Applejack is getting herself killed on top of a table in the right-middle
Dr. Whooves is walking around at the bottom-middle
Hasbro pony is looking weird at the bottom-right
Fluttershy is staring to the viewer at the top-right
Twilight Sparkle is in the middle behind a table
Luna is 2 tables to the right of Twilight Sparkle
Rarity is yet another table to the right of Luna
Bonbon is left from the list (near the text for Lyra/Bonbon)
Pokeypierce I suppose is the blue one at the bottom-middle
Hitler is getting himself burned on the fire
Waldo is standing in the middle behind a cook with a blue striped hat
Spike is standing on a table in the bottom-right with a moustache
Zecora is in the smoke at the left of the boiling pot thing
I get the feeling I shouldn't be looking for the troll, because he probably isn't there or hiding behind that flag