I'll answer, but some of what you say is puzzling. I think we should clear up some of the misconceptions that lead you to quit the first time; if any are remotely accurate then it would behoove us to make sure you won't have a reason to leave again anytime soon.
Also, not trying to be a jerk by pointing out you got some bad info, but if I'm not careful, it may sound like it (just let me know if that happens). >.>
The
Blastoise of which you speak was released three times: first in
BW: Boundaries Crossed, then in
BW: Plasma Storm, and finally one last time in
BW: Plasma Blast. All three of these rotated out of Standard play back back in 2015, but were still legal for Expanded play. The Pokémon TCG currently has two Constructed Formats used for sanctioned tournament play: Expanded (
Black & White and later releases) and Standard (
XY: Kalos Starter Set and later releases, but most just treat it as
XY and later because the
XY: Kalos Starter Set is a mini-set sold as three beginner decks). This September 1st, Expanded will remain "BW-On" (so you can still use your
Blastoise there) while Standard becomes
XY: Primal Clash and later releases (or "PRC-On"). It may also interest you to know that a new set called
XY: Evolutions is slated for release in about three months and is supposed to be another set inspired by earlier releases like the
Base Set. There is already an update of the original
Charizard revealed, so you might get another
Blastoise to enjoy soon.
If you don't like rotation, there is something known as the Legacy Format. It consists of the
HeartGold/SoulSilver series,
Call of Legends, and
Black & White series of releases. No new sets are added and so no older sets rotate out. It is exclusive to the Pokémon Trading Card Game Online (PTCGO) though perhaps TCG One does it as well. The PTCGO is like TCG One
except:
- You have to work to earn the cards...
- ...because it is official and thus you're still supporting the game.
Free to play, but easier if you do wish to spend money on product IRL, as said product (booster packs, theme decks, etc.) will come with redemption codes you can use to get virtual product in the PTCGO. I haven't spent any money on the PTCGO, only time, and I've got several solid decks. The only difficult to obtain card missing from my
Blastoise deck there is the one that is even harder to get IRL:
Tropical Beach.
The game's pacing is still very quick; this puts decks that manually Evolve at a disadvantage. So just as it has been for the last several years, only the best combination of speed and power tend to have a chance. That means
some Stage 2 Pokémon are worthwhile, some are not. We have
Archie's Ace in the Hole and
Maxie's Hidden Ball Trick to help Water and Fighting Stage 2 Pokémon (respectively) hit the field easier, while
Forest of Giant Plants helps those which can Evolve from a Grass Type. Some Stage 2 Pokémon have other tricks to make it work out.
You may have left before BREAK Evolutions were released; take an Evolution line and extend it one point past where it normally goes; so the BREAK Evolution of a Basic is like a Stage 1, of a Stage 1 is like a Stage 2, and of a Stage 2 is like a Stage 3. For the purpose of game mechanics (like cards that reference a specific Stage) they are however BREAK Evolutions and not those Stages; the BREAK Evolution of a Stage 1 is harder to play than an actual Stage 2 because shortcuts like
Rare Candy don't work with it. Yet the BREAK Evolution of a Stage 1 (
Trevenant BREAK) and the BREAK Evolution of a Stage 2 (
Greninja BREAK) have met with competitive success, though they aren't the current top deck.
The only thing keeping this from being the fastest format we have seen is the first turn rule that keeps the player who goes first from attacking. This may change some with the rotation as we lose a few cards (
Battle Compressor) that helped keep that speed up. Still, even if that slows things down, it won't be by much.
Building your own deck has been hard since pretty much forever. Most of the time someone else comes up with the same idea as you, and in fact that is the job of Pokémon R&D to make sure nothing is too good. I'll resist making a joke about that. If that sounds snooty... I spent some time as a deck snob where I frowned upon people using something they didn't create themselves. Because it was my excuse for not optimizing my own decks with cards I didn't have, or getting better at the game. ^^'
All is not lost though; rogue decks do still exist. Just realize most of the time they spring up in multiple locations as someone somewhere figures it out. Then either one of those people or someone else does well in the next of the Championship Series and the rogue becomes an archetype. Some only like to apply the label "rogue" retroactively; if you build a deck that can't perform well reliably, is that really a feat worth naming?
Because obtaining successful lists is getting easier all the time, you can still flex your deck building muscle; deck lists are
not evergreen. Even ignoring new releases, if you take a list that won a tournament handily last month, expect everyone and their brother to be prepared for that list at the next event. You'll need to tweak (or sometimes radically alter) it to remain competitive.
Not silly, but currently unanswerable. We are heading into the World Championships in... two weeks? Then September 1st is the yearly rotation for Standard play. The thing about rogue decks is if you can see it coming, you're either very skilled or it isn't really a rogue deck.
Decks tend to gravitate towards hitting fast, hard, and reliably, being slow and methodical while locking down your opponent's options, or a combination of both. You know... the basic split in TCG deck design. XD
Night March is a deck built around Pokémon with the "Night March" attack or capable of copying it. Said attack does more damage for each Pokémon in your discard pile that has said Night March attack printed on it. When all goes well the deck can fill its discard with enough Night March Pokémon to score a OHKO on its first turn, and only a bad start won't have them locked and loaded by the player's second or third turn. Night March Pokémon are glass cannons; their HP scores are abysmally low (30 or 60 for the ones you actually attack with). The deck is sensitive to damage spread, Item lock, and Ability lock. It also runs very little Energy, and almost all Special Energy, so Energy disruption/control can also give it a hard time. Still, one of the best decks in the format.
Vespiquen (
XY: Ancient Origins 10/98) has an attack for [CC] that does 20 damage plus 10 more for each Pokémon in your discard pile. Like Night March it fills its discard pile rapidly, allowing it to being taking OHKOs almost immediately. Some builds include
Forest of Giant Plants so it does not have to wait to Evolve. It has almost all the same strengths and weaknesses as Night March decks, but with the specifics or degrees changed; different literal Weakness on your attackers, more HP but still fragile, needs more Pokémon to hit the same damage amount but every Pokémon counts towards the total, etc. Often combined with either Night March (where it may honestly be the current best deck in the format) or
Vileplume (
XY: Ancient Orings 3/98) for a vicious Item lock deck that is still fast and hard hitting. The
Vileplume version will get
Vileplume into play on that player's first turn unless the opponent is very lucky.
Trevenant BREAK decks use
Trevenant BREAK and
Trevenant (
XY 55/146). BREAK Evolutions retain the Ability, attacks, Weakness, Resistance, and Retreat Cost of the Pokémon from which they BREAK Evolve, so
Trevenant BREAK gets to lock down Abilities while Active when used in this manner. It also has an inexpensive spread attack.
Trevenant (but at least not
Trevenant BREAK) is intended to hit the field first turn. It will usually run additional disruption elements like Energy discarding cards. Its Darkness Weakness is a big danger (more on that in a bit) and there are anti-spread cards that almost totally mitigate its best attacks.
Darkrai-EX (
XY: BREAKpoint 74/122, 118/122) can hit harder the more Darkness Energy is in play.
Giratina-EX (
XY: Ancient Origins 57/98, 93/98) has an Ability that protects it from Mega Evolutions, while its attack prevents your opponent from playing Stadium, Special Energy, or Pokémon Tools from hand (and does solid damage). Thanks to
Double Dragon Energy, you can use
Giratina-EX to get a lot of [D] Energy in play quickly (
Double Dragon Energy provides two units of Energy that count as all Energy Types).
Giratina-EX is also used with
Seismitoad-EX, for a deck more focused on locks. I am embarrassed to say, but I cannot remember if all three are used together or not.
Water Toolbox is a deck built around Basic Water Type attackers that all have different specializations. This is your typical Toolbox deck so as long as it gets the correct Pokémon at the correct time, it can counter many popular strategies. Of course, there are counters for its counters as well.
I've just described the various decks that managed to place in the Top 8 of the Masters Division at the 2016 U.S. National Championships. You can see the lists for these decks on the official Pokémon website
here. Other recent, well performing decks are:
Greninja BREAK decks are slow starting, but are also the most budget friendly deck due to not using
Shaymin-EX (
XY: Roaring Skies 77/108, 106/108). Seriously, every other deck on here will want at least two copies of that thing.
Greninja BREAK avoids running any Pokémon-EX and uses
Greninja (
XY: BREAKpoint 40/122) and
Greninja (
XY 41/146). Usually the
XY: BREAKpoint Greninja is favored because it has a free Retreat Cost plus an attack that shuts down Abilities on your opponent's turn (read the cards and this will make more sense).
Greninja from
XY is still handy for extra damage counter placement. The deck is known for being down three, four, even five Prizes but then getting its setup and wrecking the opponent in another two or three turns for the win.
Mega Man, which consists of
M Manectric-EX and various Basic attackers that it fuels; a Toolbox deck.
Zygarde-EX/
Carbink BREAK, a Fighting Type deck. Just look through Fighting Type support and you'll get a good idea of how it works.
Medicham (
XY: Primal Clash 81/160) works in a similar manner, just using a small Stage 1 that can attack twice in a turn instead of a big, Basic Pokémon-EX.
Blackbox decks are a Darkness Tool Box deck, usually focused on
Yveltal (
XY 78/146 plus multiple re-releases),
Yveltal-EX,
Zoroark (
XY: BREAKthrough 91/162), and sometimes
Zoroark BREAK. Some versions will use
Maxie's Hidden Ball Trick and some useful Fighting Types like
Gallade (
XY: BREAKthrough 84/162) instead, which isn't actually a Blackbox deck but I didn't feel like listing it separately.
Bronzong (
XY: Phantom Forces 61/119) can attach basic Metal Energy from the discard pile to your Benched Pokémon. It is used to back up other Metal Type attackers, most notably
Genesect-EX (
XY: Fates Collide 64/124, 120/124).
Bronzong isn't picky though and versions backing
Giratina-EX (same version as above) and
Tyrantrum-EX have done well before, as well as
M Rayquaza-EX (
XY: Roaring Skies 76/108, 105/108). Said
M Rayquaza-EX also is used on its own, relying more heavily on
Double Colorless Energy and
Mega Turbo, but still working by dropping a
Sky Field and rapidly filling its Bench to OHKO basically everything in the game.
Jolteon-EX and
Vaporeaon-EX have attacks that are quite good at walling against an unprepared opponent. Often they are worked into something else, but some decks focus on them.
Seismitoad-EX/
Crobat uses
Crobat (
XY: Phantom Forces 33/119) to offset the low damage output of
Seismitoad-EX and its Quaking Punch (which locks down Items on your opponent's turn).
Aromatisse (
XY 93/146) can move Fairy Type Energy around. There are a couple variants built around this but I'm not sure which ones are popular right now. It isn't overly strong, but it is a functional deck.
Entei (
XY: Ancient Origins 15/98) had a successful deck where it paired up with
Charizard-EX (
XY: Flashfire 12/106); it was basically a fast, raw power deck though it could pull some defensive tricks. Hasn't been successful for a while, but you still run into them every now and again.
Wailord-EX had a stall/mill deck that also had some success, but I don't think it has been as good lately.
Anyway, out of time. Sorry some of these are rather... messy.