The leafeon did a last solarbeam.

Mewtwo used confuson on the blast and threw it back at leafeon

The leafeon fell unconcious. "Leafeon No!"

"That was a good battle" Link says healing both the pokemon "Though you should watch out for a shady person." Link says jumping back into the treetops when a shady man appears, he sends out Salamance (The shady mans pokemon is Salamance, Flygon, Hydregion, Dragonite all level 70)
"Mewtwo! Psychic!" Leafeon and emerald are lifted to where Link and mewtwo is "If you loose to him he will steal that leafeon of yours." Link explains

leafeon sent a huge solarbeam that would ko 1 of the pokemon

(a level 5 would have no advantage to a level 70 Salamance and Solar beam would be 3/4 decrease of damage due to types)
Salamance Hyper beams the tree, Mewtwo uses psychic on the attack and reverses it to the shady man himslef

Go! leafeon ran fast using solar iron.

"Salamance." shady man says and salamance flys upwards, Leafeon misses, Then a Hyper beam Is launched at leafeon from salamance

Leafeon jumped to the side.