This is a summary of Generation 3.5 of My Little Pony. For a more in-depth look, check out the page on the My Little Wiki for Generation 3.5.
Generation 3.5 (shorthand: G3.5) was the fourth incarnation of the My Little Pony toyline. It was produced for just one year from late 2009 through late 2010.
This was the start of a much more character-focused toyline, only seven ponies were produced but there are many varieties of each character. For example, one release would have a plain pony, but another would feature some gradient on their legs, and then the next release would have a Twice-As-Fancy style symbol, and so on.
There was a handful of shorts and one movie for this generation, and there is also overlap with G3's portrayal of the characters.