I don't play in any tournaments, but I'd like to build a Galvantula deck for casual play with friends and online. I may one day use it in a tournament, though there aren't really any around where I live. It's HGSS-on because I'm fairly new and so those are really the only cards I have anyway. The Trainers probably need some work since I'm not really sure what's all staple.
Pokemon: 20
3-3 Galvantula
3-2-3 Magnezone Prime
2-2 Lanturn Prime
3 Smeargle
Trainers: 25
4 Pokemon Collector
2 Plus Power
3 Professor Oak's New Theory
3 Defender
2 Professor Elm's Training Method
4 Rare Candy
2 Flower Shop Lady
2 Twins
Energy: 12
13 {L}
4 {C}{C}
Start with Joltik. Bench Pachi and Shaymin to get 2 {L} Energy on Galvantula. Use Plus Powers and/or Black Belt and start damaging and healing. Magnezone Prime for draw power and Lanturn Prime to counter Galvantula's weaknesses.
Pokemon: 20
3-3 Galvantula
3-2-3 Magnezone Prime
2-2 Lanturn Prime
3 Smeargle
Trainers: 25
4 Pokemon Collector
2 Plus Power
3 Professor Oak's New Theory
3 Defender
2 Professor Elm's Training Method
4 Rare Candy
2 Flower Shop Lady
2 Twins
Energy: 12
13 {L}
4 {C}{C}
Start with Joltik. Bench Pachi and Shaymin to get 2 {L} Energy on Galvantula. Use Plus Powers and/or Black Belt and start damaging and healing. Magnezone Prime for draw power and Lanturn Prime to counter Galvantula's weaknesses.