Ooooh! My second favorite type of deck. I will post mine so you can get an idea of what to put in one. The point of this deck is to get as many water energies into the discard pile, than riptide to do major damage. Then the water energies go back to your deck. This deck is a little outdated.
Pokémon (16)
4 Feraligatr (3 Neo Genesis Riptide, 1 Holo Expedition)
2 Croconaw (Neo Genesis - Sweep Away)
4 Totodile (2 Neo Genesis Fury Swipes, 2 Expedition Double Scratch)
2 Qwilfish (Neo Revelation)
2 Articuno (Fossil)
2 Cleffa (Neo Genesis)
Trainers (29)
4 Professor Oak (Base Set)
4 Pokémon Breeder (Base Set)
3 Computer Search (Base Set)
3 Gold Berry (Neo Genesis)
3 Misty's Wrath (Gym Heroes)
3 Warp Point (Gym Challenge)
3 Seer (Aquapolis)
2 Super Energy Removal 2 (Aquapolis)
2 Secret Mission (Gym Heroes)
2 Trash Exchange (Gym Heroes)
Energy (15)
15 Water Energy