They always feel like explaining everything in that game, but again, the theme is what made that classification, not the gameplay.
Also, Gates of Infinity had a pokemon dying, so oops.
Theme refers at what is it about. Gen 5 were about pokemon liberation and how they must be freed from their “human slavers”, and abusing their powers to obtain what you want. In this case, Ghetsis ideals.
So im guessing X&Y have a bit deeper theme going on.
Pokemon X & Y have been rated as PG in Australia, which apparently is higher than BW/B2W2, but the same as Gates of Infinity.
Sadly we get no nudity, drugs or sex.
IT WAS ANNIE OMFG!!!