List of Leo Deaths:

Gen 1:

Pidgeotto-> https://clips.twitch.tv/ResourcefulEsteemedBeeMau5
Pikachu
Mankey
Dugtrio
Nidoqueen
Snorlax
Venusaur
Charizard

Gen 2:

Ursaring
Nidoking

Gen 3:

Zigzagon
Chinchou

FR/LG:

Jigglypuff

Gen 4:

Gen 5:

Gen 6:

Gen 7: