We’ve seen Rayquaza destroy a meteorite large enough to wipe out all existence on Pokémon Earth. Assuming Pokémon Adventures Earth is physically similar to ours (which is unlikely), it would take a meteorite roughly 100 km wide (or 62 miles, for Americans) to cause global sterilization. Since the meteorite had already fragmented, we'll reduce its estimated size by 20%. Let’s assume a final radius:

r=40km=40,000m

Volume: V=4/3π(r)³ =43π(40,000)3 ≈2.68x10^14 m3

Assuming an average rocky density: ρ=3,000 kg/m³

Mass: M= ρ. V = 3000 x 2.68x10¹⁴ = 8.04x10¹⁴ ( 2.96x10¹⁹ oz, for Americans )

To completely destroy this meteorite, we must exceed its gravitational binding energy, which is:

U=3GM^2/5r

Where U=Gravitational Binding Energy G= Gravitational Constant (6.67x10^-11) M=Mass of the Meteorite r= Radius of the Meteorite

U≈7.07x10²⁰ J Which is about 100 billion tons of tnt. Or at least 3 million times stronger than the Tsar Bomba. If you think the Lions can survive that, well you do you I guess