FRLG Stat Requirements

Bulbasaur:
Special Attack: 29 (Ashton's Cubone)
Speed: 30 (Allcia's Bellsprout1)

Squirtle:
Attack: 24 (Martha's Bulbasaur)
Special Attack: 27 (Sally's NidoranF w/torrent w/o crit)
Speed: 17 (Miguel's Voltorb)

Charmander:
Attack: 17 (Rival4's Wartortle)
Special Attack: 30 (Colton's Weedle)
Speed: 29 (Misty's Starmie)

Dragonair:
Attack:
10 Surge's Raichu w/o crit
8: Koga's Muk
Special Attack:
23: Giovanni's Kangaskhan, Erika's Tangela w/o crit, Warren's Nidoqueen w/o crit
21: Blaine's Arcanine
7: Lori's Exeggcute w/o crit
Speed:
28: Rival4's Pidgeot (might be irrelevant since it can use whirlwind)
26: Aaron's Primeape
22: Sabrina's Kadabra
15: Blaine's Ponyta
11: Rival4's Gyarados
2: Giovanni's Kangaskhan

Rhyhorn:
Attack:
23: Surge's Voltorb w/o crit or SE move, Kirk's Drowzee w/Strength

Zapdos:
Attack: 14 (Agatha's Gengar1)
Special Attack: 8 (Rival5's Alakazam)
Speed: 20 (Rival5's Alakazam)