HP-on is this years format.
DP-on is next years format (preferred)
Notable trainers: Felicity's Drawing, Bebe's Search, Roseanne's Research, Night Maintenance, Rare Candy, Team Galactic's Wager, Claydol GE.
Also, this forum is for decks and strategies, so maybe this would be better served in the Single Card Discussion or RTC forum.
T2 Banette is basically a deck based around getting out the Banette card on Turn 2.
Typical list would be:
Pokemon:
4 Shuppet CG
4 Banette
2 Baltoy
2 Claydol GE
2 Lunatone
1 Solrock
NRG:
10 Psychic
2 Multi
Trainers:
4 Felicity
4 Bebe
3 Roseanne's
4 Master Ball
4 Quick Ball
4 Cessation Crystal
3 Crystal Beach
2 Lake Boundary
2 Night Maintenance
3 PlusPower
As a rough draft, I am nowhere near knowing what that deck needs. (I don't play Banette)