It looks like you guys love creating card game repositories. I supposed it's only natural for this fandom! Two of them have popped up, each with different positives and negatives.
The first goes by the name of "MY Little Pony TCG Archive", and the second simply "My Little Pony Trading Cards". Both sites are as simple as simple can get, with basic HTML And link lists. Neither are complete, though the creators of each are slowly adding cards as we speak. Hopefully we will have a fully completed repository soon!