Right, my apologies!
I'm planning on using the following:
Evee - Furious Fists
Eveelutions - Ancient Origins
Combee - Ancient Origins
Vespiquen - Ancient Origins
Unown - Ancient Origins
Octillery - Breakthrough
Spinarak - Ancient Origins
Airiodas - Ancient Origins
I'm fairly certain all of those are legal, but I'm less sure about the items. Do they rotate just like Pokemon, or are they always legal?
The only thing that is "always legal" are basic Energy cards, and I am not sure if that is a special rule or just because they are
constantly reprinted. When players talk about "rotation" in Pokémon, they mean Pokémon TCG sets, also known as "expansions". So for example,
XY: Furious Fists is an entire set or expansion. When it "rotates" out of Standard play, the
entire set is gone: Pokémon, Trainers, and Energy. The exception are reprints, but that happens on the basis of individual cards. Let us look at
XY: Furious Fists for some examples:
- Korrina has only been released as XY: Furious Fists 95/111 and 111/111. When XY: Furious Fists rotates from Standard play, so does Korrina unless they re-release her card in a future set (at which point older copies become legal).
- Strong Energy was first released as XY: Furious Fists 104/111, but has also been released as XY: Fates Collide 115/124. When XY: Furious Fists rotates out of (leaves) Standard play, so long as XY: Fates Collide doesn't go with it, Strong Energy will remain legal.
September 1st, the current Standard Format (
XY: Kalos Starter Set and later expansions plus all
XY: Black Star Promo cards) will change, becoming
XY: Primal Clash and later sets plus
XY: Black Star Promos XY36 and after. You can read the official announcement, which lists the sets individually, including some more obscure mini-sets,
here. Odds are they, PokéBeach... actually most Pokémon TCG sites will sooner or later post a list of all individual cards that remain legal because of reprints. Until then you can use the card database there to look up cards by name and see if they have reprints. I mean, if you don't want to wait for someone to be nice and answer here.
So based on what I just said, that
Eevee is going to rotate out of Standard play. Expanded did not lose any sets this year, so it remains
Black & White and later expansions plus all
BW: Black Star Promos and
XY: Black Star Promos.