Flyphan is definitly a T1 deck - 5-2 today at states (should have been 6-1 but I had a few errors that cost me 1 round).
1. Cursegar - T1 Donphan with 1 energy = kill spiritombs then go after the gengars, level downed once, but recovered for a 3 prize win
2. Gryados - Win by 2 prizes (and what I win, gryados is not an autoloss to flyphan if played carefully and you set up) - and he was hitting 90 damage T2 with luxray GL Lv. X
3. Mr. Mime SP rogue deck - Loss due to misread of the ruling on Mr. Mimes airy wall body - should have won that game if I knew the ruling on the card.
4. Rotom Toolbox Rogue - traded prizes, (vicious with the SP that makes weakness double and cherims choice), ran out of time, was down 2 prizes to 1
5. Lady Gaga - Set up very fast and killed Dialga G early, they never set up
6. Jumpluff - nidoqueen to the rescue - 50+ 10 per benched pokemon = 110 damage and bye bye jumpluff... finished off the rest with earthquake and powerswing - sweet victory!
7. Gyrados SP something - dead - donked T2 with donphan, phanphy, rare candy, and fighting energy! (60 x 2 = 120 for 2HKO)
So can it work, yes. Does it have trouble - it can, but all decks have weaknesses. I will be excited to try this at regional.