Quoted By:
OFFICIAL NOTABLE IN-GAME POKEMON KILL COUNT AND CAUSES OF DEATH (that I can remember at the moment):
>Lavender Town Marowak: Killed by Team Rocket grunts.
>Original forms of Entei, Suicune, and Raikou: Couldn't escape as Bell Tower burned down.
>Looker's Croagunk: Died in the line of duty.
>Alder's starter: Illness.
>AZ's Floette: War.
>At least dozens of various Pokemon: Used as batteries for the Ultimate Weapon.
>At least two armies of Pokemon: Nuked by the Ultimate Weapon (AZ confirmed for most prolific Pokemon murderer ever)
