Algebroot Neogears 
Sci-fi & Dragons
In my opinion, the worst episode in the entire series may be "It Ain't Easy Being Breezies". I liked breezies and wanted to see them appear in G4. Then the episode appeared and in general it feels to me like the writer hated breezies even before this episode was made and the episode was written specifically to stealthily ensure it's nigh-impossible for anyone to even want to write breezies into the show:
1. Make them magicless insects coincidentally shaped like ponies, so they can't last at all in the main world.
2. Box them off in another dimension, so that writers can't let them be visited from the main world by normal means.
3. Make said dimension only available through a portal available once a year which opens and closes only automatically on a set time limit, so writers won't be able to make them visit the main world either.
4. Make it Fluttershy's key episode, both to justify all the above and to prevent anyone from ever ignoring the episode when writing anything.
1. Make them magicless insects coincidentally shaped like ponies, so they can't last at all in the main world.
2. Box them off in another dimension, so that writers can't let them be visited from the main world by normal means.
3. Make said dimension only available through a portal available once a year which opens and closes only automatically on a set time limit, so writers won't be able to make them visit the main world either.
4. Make it Fluttershy's key episode, both to justify all the above and to prevent anyone from ever ignoring the episode