Add new items.
Add TMs/HMs for X/Y.

TM100 might get mistaken for HM00, idk.  Really there should just be an
is_hm column.  I'd do it myself, but then I'd have to update
spline-pokedex too, and urgh.
Add moves for Kalos Pokémon.

Level-up moves taken from the spreadsheet; other moves taken from
Pokémon Showdown.
Tweak a couple new ability descriptions.
Add stats for new Pokémon, incl Megas.
Add egg groups for new Pokémon.

I'm kind of confused about these.  These data (which I got from
Showdown, again) include egg groups for Carbink, which is genderless;
I have heard that the official guide lists egg groups, but then
Pumpkaboo and Gourgeist aren't listed as being in Grass, which is...
very suspicious.  Hm.