Deathmaster Snikch
Snikch is the Deathmaster, Chief Assassin and prime agent of Sneek, a Lord of Decay and the ruling Nightlord of the Skaven's Clan Eshin. His infamy is only exceeded by the mystery which surrounds his whereabouts at any particular time. Sneek ensures that this is the case -- as long as no one...
vsbattles.fandom.com
So which Pokémon should I throw this rat at?
If I understand right, it sounds like there's no candidates for a Pokemon matchup.
For 7-A, results that came up include DC Animated Movies characters (Like Martian Manhunter!), Gandalf, Transformers: Prime Transformers like Megatron & Bumblebee, etc., Power Rangers Monsters of the Weeks, Naruto characters, Invincible TV Series characters, Young Justice characters....
If you want 7-A, I wouldn't mind doing VS Debates featuring Martian Manhunter (DCAM) or Gandalf.
Sadly, Klarion, Child & Doctor Fate are High 6-A so they'd need other candidates.
If there's other tiers to pick from, I could go through those. Just say which.