Gym Challenge seems to be one of the best expansions released for a long
time.  Gym Challenge contains some of the MOST broken cards and card
combinations yet released in a single expansion.  I'll cover what I consider
some of the MOST broken cards and combos made possible by this expansion.

Name:        Max Revive
Type:        Trainer
Text:        Discard 2 Energy cards from your hand in order to put 1 Basic
             Pokemon from your discard pile onto your Bench.  (You can't play
             Max Revive if your Bench is full.)

Max Revive may not look like much at the beginning, but if one considers that
most pokemon in most decks are basics, this becomes more appealing.  Need a
TR's Zapdos ASAP?  Look no further.  Play Max Revive and get one back from
your discard pile.  In Prop 15/3C, this will become even more useful, because
there will be an abundance of energy, but limitations on pokemon. 

Name:        Chaos Gym
Type:        Stadium Card
Text:        This card stays in play when you play it.  Discard this card if
             another Stadium card comes into play.
             Whenever a player plays a Trainer card other than a Stadium card,
             he or she flips a coin.  If heads, that player plays that card
             normally.  If tails, the player can't play that card.  If the
card
             isn't put into play, the player's opponent may use that card
             instead, if he or she does everything required in order to play
             that card (like discarding cards).  Either way, the card goes to
             its owner's discard pile.

Chaos Gym is incredible; it effectively halves the chance of ANY trainer card
(except Stadium cards) to work.  Additionally, this allows you to use your
opponent's trainers if and when they fail.  Good, period, but even better
considering the limitations given by Prop 15/3C.

Name:        Sabrina's Kadabra
Type:        Stage 1 -- Evolves from Sabrina's Abra
Color:       Psychic
HP:          70 HP
Weakness:    P
Resistance:  none
Retreat:     1
Attack:      [P]  Life Drain
             Flip a coin.  If heads, put a number of damage counters on the
             Defending Pokemon so that its remaining HP are 10.
Attack:      [2P]  Psyshot  (30)

Great card, its first attack is nearly broken.  Add a Sabrina's ESP, and you
make it 75% chance of reducing your opponent's HP to 10.  Include some Dk.
Golbat and Devolution Spray, and you can use Sneak Attack to take out the
crippled pokemon, then Life Drain again, then repeat.  A great way to crank
out the kills.

Name:        Sabrina's Golduck
Type:        Stage 1 -- Evolves from Sabrina's Psyduck
Color:       Water
HP:          70 HP
Weakness:    L
Resistance:  none
Retreat:     2
Attack:      [PP]  Damage Shift
             Move 1 damage counter from each of your Pokemon that has any on
             it to the Defending Pokemon.  (Don't apply Weakness and
             Resistance.)
Attack:      [2W]  Water Spray  (20+)
             Flip a coin.  If heads, this attack does 20 damage plus 20 more
             damage; if tails, this attack does 20 damage.

Combo: Sabrina's Golduck+Base Alakazam.  Damage Shift 60 damage off your own
pokemon and onto your opponent's?  This works a lot like Wigglytuff, but two
major differences; it requires more evolutions than Wiggly making it harder
to pull off, and it has much better payoff once you get the combo going.  One
can get the damage Swap going on turn two with an Alakazam (breeder) and
start returning the beating.  A full bench allows you to get the most out of
Damage Shift, so don't skimp on the basics.  A few rainbow energies allow you
to use Water Spray, and give you more damage to use with Damage Shift if your
opponent decides NOT to use high powered attacks.  This is a SOLID combo.

Name:        Koga's Arbok
Type:        Stage 1 -- Evolves from Koga's Ekans
Color:       Grass
HP:          90 HP
Weakness:    P
Resistance:  none
Retreat:     2
Attack:      [G]  Poison Buildup
             Koga's Arbok is now Poisoned.
Attack:      [GG]  Poison Powder  (20)
             If Koga's Arbok is Poisoned, this attack's base damage is 40
             instead of 20 and the Defending Pokemon is now Poisoned.

This guy's great...yeah, he poisons himself, but potions and/or supor potions
will keep him alive for a long time; remember, he's got 90 HP.  Poison
buildup is necessary to get the most out of Poisonpowder; 40 damage+
autopoison for GG?  Unbelievable.  This guy'll see a lot of play in status
effect decks.

Name:        Sabrina's Alakazam
Type:        Stage 2 -- Evolves from Sabrina's Kadabra
Color:       Psychic
HP:          80 HP
Weakness:    P
Resistance:  none
Retreat:     3
Power:       "Psylink"
             Sabrina's Alakazam always has a copy of every attack your P
             Pokemon in play have (including their Energy costs and anything
             else required in order to use those attacks, such as dicarding
             Energy cards).  This power can't be used if Sabrina's Alakazam is
             Asleep, Confused, or Paralyzed.
Attack:      [3P]  Mega Burn  (60)
             You can't use this attack during your next turn.            

Can you say "broken"?  This guy's attack is really powerful, and its Poke
power is deadly.  Keep an MP Mewtwo on your bench to charge up for Mega Burn?
 Perhaps a TR Mewtwo so you can follow up with a Psyburn?  Maybe a Jynx for
Meditate?  There are endless combinations, and none are bad.  This guy's got
serious power, and the ability to use any psychic attack you have in play is
really devastating.

Name:        Misty's Gyarados
Type:        Stage 2 -- Evolves from Misty's Magikarp
Color:       Water
HP:          100 HP
Weakness:    G
Resistance:  F -30
Retreat:     3
Power:       "Rebellion"
             Whenever Misty's Gyarados attacks, flip 2 coins.  If both of them
             are tails, that attack does nothing.  Instead, shuffle Misty's
             Gyarados and all cards attached to it into your deck.  (This
power
             works even if Misty's Gyarados is Confused.)
Attack:      [WWWW]  Tidal Wave  (70)

Every time I play this guy, I love him even more.  Yes, he's weak to Scyther,
but Gyarados smashes the mantis to pieces in one shot.  Rebellion isn't a
problem if you play Muk, which wouldn't be all too bad an idea since there
are so many new powerful pokemon powers out there.  70 damage per turn should
NEVER be overlooked, particularly when there's no drawback.  This guy COULD
work in Raindance, but I'd recommend a deck centered around him and Muk. 

Name:        Erika's Venusaur
Type:        Stage 2 -- Evolves from Erika's Ivysaur
Color:       Grass
HP:          90 HP
Weakness:    R
Resistance:  none
Retreat:     2
Attack:      [G]  Growth
             Flip a coin.  If heads, you may attach up to 2 G Energy cards
from
             your hand to Erika's Venusaur.
Attack:      [GGGG]  Wide Solarbeam  (20)
             If your opponent has any Benched Pokemon, choose 2 of them (or 1
             if he or she has only 1).  This attack does 20 damage to each of
             them.  (Don't apply Weakness and Resistance for Benched Pokemon.)

Growth gives you a way around annoying ER and SER, and Wide Solar Beam is a
REALLY powerful bench-destroying attack.  You COULD combo Erica's Venusaur
with Base Venusaur to get large amount of grass energy in play with Growth,
then spread it around to big grass basics like Scyther, TR Scyther, Pinser,
or Giovanni's Pinser ASAP, but it works just as well to load up Erica's
Venusaur for some major Wide Solarbeaming.

Name:        Brock's Ninetales
Type:        Stage 1 -- Evolves from Brock's Vulpix
Color:       Fire
HP:          70 HP
Weakness:    W
Resistance:  none
Retreat:     1
Power:       "Shapeshift"
             Once during your turn (before your attack), you may attach an
             Evolution card from your hand to Brock's Ninetales.  (This
doesn't
             count as evolving Brock's Ninetales.)  Treat Brock's Ninetales as
             if it were that Pokemon instead.  It can't evolve, devolve, or
use
             the Pokemon Power of that Pokemon.  During your turn, you may
             discard the Evolution card attached to Brock's Ninetales.  This
             power can't be used if Brock's Ninetales is Asleep, Confused, or
             Paralyzed.  If Brock's Ninetales becomes Asleep, Confused, or
             Paralyzed, discard all Evolution cards attached to it.
Attack:      [RR]  Will-o'-the-wisp  (30)          

This was one of the most awaited pokemon in the expansion, but a lot of
people were disappointed with the addition of text stating pokemon powers of
shapeshifted pokemon couldn't be used.  However, Ninetails still works great
with Big bad fire pokemon like Blaine's Arcanine, Blaine's Charizard, Base
Ninetails, or even Base charizard.  Basically, you build up a lot of energies
on ninetails, evolve, attack for large amounts of damage with big discards,
then discard the evolution and Will-o'-the-Wisp until you an reload for
another few rounds of big attacks.   So, this guy's still plenty of use,
particularly for the big discards on some big fire attacks.

Name:        Rocket's Zapdos
Type:        Basic Pokemon
Color:       Lightning
HP:          70 HP
Weakness:    none
Resistance:  F -30
Retreat:     2
Attack:      [L]  Plasma  (20)
             If there are any L Energy cards in your dicard pile, attach 1 of
             them to Rocket's Zapdos.
Attack:      [1LLL]  Electroburn  (70)
             Rocket's Zapdos does damage to itself equal to 10 times the
number
             of L Energy cards attached to it.

Repeat after me: Broken.  Remember back when everyone thought Hitmonchan's 20
damage for 1 fighting energy "Jab" was all powerful?  Well, add a sponging
ability and you've got plasma.  And, if that's not enough, Electroburn deals
out some serious damage as well, with the drawback of some self damage. 
'Course, a few defenders couldn't hurt, nor could some Super Potion, but this
guy can EASILY hold his own.  Wait, there's more!  70 HP is great, and he's
got no weakness, and fighting resistance.  This guy's just plain broken.

Well, I'm sure there are other equally good (or better) cards or combos in
this set, but these were the one's that I've seen or tried.  Good luck with
Gym Challenge; tis a great set.

                                            -FossilMagikarp
                                        email: Edestus360@aol.com