Pokemon Card GB
This game is based on the Wizards Pokemon Trading Card Game, and covers the Base, Jungle, and Fossil Expansions. The following guide is for those who can't beat a certain Club leader and need help. An example deck for beating each Gym leader will be listed with the suggestions.
WATER CLUB
I suggest using Electric/Grass Pokemon, and that'll mean an Electabuzz is essential.
Suggested Deck: "Electrical Troops"
4 Electabuzz
2 Base Pikachu
2 Jungle Pikachu
2 Base Raichu
2 Fossil Zapdos
3 Voltorb
2 GB Electrode
3 Eevee
1 GB Jolteon
1 Jungle Jolteon
20 Electric Energy
4 Bill
2 Gambler
2 Pokeball
2 Pokemon Trader
2 Gust of Wind
2 Switch
2 Energy Retrieval
2 Recycle
FIRE CLUB
I suggest building up a deck around Blastoise's Rain Dance, probably with Dewgong or Gyarados.
Suggested Deck: "Raindrops"
4 Squirtle
3 Wartortle
3 Blastoise
4 Seel
3 Dewgong
2 Fossil Articuno
1 Lapras
20 Water Energy
4 Energy Retrieval
3 Gambler
4 Bill
2 Prof. Oak
2 Recycle
3 Switch
2 Gust of Wind
ELECTRIC CLUB
Look for Fighting Pokemon with Electric Resistance, that way, you'll have a double-advantage situation. Look out for Zapdos with (Fighting Resistance)!
Suggested Deck: "Land Mine"
4 Rhyhorn
3 Rhydon
3 Diglett
2 Dugtrio
3 Cubone
2 Marowak
24 Fighting Energy
4 Bill
4 Energy Retrieval
3 Gust of Wind (Especially for the Zapdos and Flying Pikachu)
3 Gambler
2 Super Potion
3 Switch
FIGHTING CLUB
Use Psychic Pokemon and you may have some problems with the Colorless Pokemon in their decks. That's why I suggest putting a few flying Pokemon to take them out.
Suggested Deck: "Mind Flight"
2 Farfetch'd
3 Doduo
2 Dodrio
3 Fossil Gastly
2 Fossil Haunter
2 Gengar
2 Jynx
2 Base Mewtwo
19 Psychic Energy
3 Double Colorless Energy
2 Energy Retrieval
2 Gust of Wind
2 Switch
4 Bill
2 Pokemon Trader
2 PokeBall
2 Gambler
2 Recycle
2 Computer Search
ROCK CLUB
This is the easiest club by far. Just use a grass deck and you're on your way to victory. Venusaur, anyone?
Suggested Deck: "Solar Explosion"
4 Bulbasaur
3 Ivysaur
3 Venusaur
4 Exeggcute
4 Exeggutor
2 Scyther
16 Grass Energy
4 Double Colorless Energy
4 Energy Retrieval
4 Bill
2 Gambler
2 Gust of Wind
3 Switch
3 PokeBall
2 Pokedex
PSYCHIC CLUB
This club uses an all-psychic offensive, but don't be surprised to find a few Colorless there. The Club Leader seems to like to stall, but you could easily knock out the brains of his deck with dragons.
Suggested Deck: "White Dragon"
4 Dratini
3 Dragonair
3 Fossil Dragonite
3 Kangaskhan
4 Jungle Jigglypuff
3 Wigglytuff
4 Double Colorless
Energy
16 (Any Other) Energy
4 Bill
4 Recycle
4 Gambler
2 Switch
2 Gust of Wind
2 Super Potion
2 PokeBall
SCIENCE CLUB
Use the deck you used at the Psychic Club and you'll probably win.
GRASS CLUB
Obviously, BURN! Arcanine and Magmar are good hits, and be careful on using Charizard -- never bring it out without enough Energy!
Suggested Deck: "Volcanic Blast"
3 Growlithe
2 Arcanine
2 Fossil Magmar
2 Base Magmar
4 Eevee
2 Jungle Flareon
2 GB Flareon
3 Charmander
2 Charmeleon
24 Fire Energy
4 Energy Retrieval
4 Bill
4 Gambler
2 Switch
I will post up info on how to beat the elites in the future.