It’s been a while since I checked, but I definitely have (for potential sale/trade):
35, 97, 144, 145, 149, 175 (three words for ya: GIANT PINK CLOUD), 205, 211, 215, 219 and 220.
As for my own collection, I am searching for (maybe to trade):
156, 158-162, 167, 177, 183, 193, 195, 197, 199, 208, 210, 213, 214 and 222 from the original run and 7-17 (I mourn my lack of pancake-fueled Baby Lickety-Split clones), 25-29, 35, 36, 47, 49 and 50 from MLP and Friends. Poster magazines (the two for the nursery and Paradise Estate) are also appreciated.