Firium Torchic Calcs

Mienfoo- Bulky takes 75%. (156 HP, 196 Spdef) All other Variants die
Diglett- All die
Vullaby- Evio lives. All others die
Abra- Sash lives (No shit) LO Dies (No Shit)
Staryu- Can't switch in. Lives one hit at full
Timburr- 12 Speed dies 75% of the time. BU Max Spdef Swallows. Offensive 4 attacks takes 80%
Croagunk- Dies
Gastly- Dies
Onix- Has to play endure mindgames. Weak armor drops
Foongus- Dies
Doduo- Dies
Ferroseed- Dies
Grimer-Alola- Max Spdef takes 65%
Pawniard- Dies
Shellder- Can't switch in. Lives one hit at full
Snivy- Dies
Snubbull- Dies
Chinchou- Lives. HP Grass+Fire Blast KOes after rocks though so you have to work that out.
Mudbray- Juice is dead. Evio takes around 70%
Ponyta- Walls
Spritzee- Does around 65%. Also can't touch torchic
Torchic- Whoever lands fire blasts/wins speed ties wins

Granted this is just a list of A ranked pokemon getting hit by a Z move. It shows the terrifying pressure torchic applies to the meta in general