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Normal/Poison platypus
Poison/Steel smokestack monster/colossus
Rock/Electric lodestones, mix concept with an animal if you so please. Maybe a bird since they're believed to use magnets in their brains to navigate and then you could bullshit Levitate onto it
Electric/Poison - leaky battery? A little anthropomorphic generator with the sniffles evolves into a grumpy electric biohazard mess
Ground/Fighting anteater felt natural for some reason, I guess because they have huge claws and their fur makes them look like they have big forearms
Ground/Fairy could be a sphinx though Ground/Psychic would probably be just as legitimate (just not unique)
Poison/Fire salamander because people used to think they were born from fire (since they would scurry out of firewood that was lit after hiding inside). Poison is questionable but meh. Dry Skin could be a good ability for it.
Fairy/Fighting - some kind of spring-heeled Jack type deal? He was a figure from English legend that was by some accounts a monster and others a hero, but basically he was a not-quite-human who would leap around and frighten people. Maybe more fitting for Fairy/Dark upon review. Would obviously learn bounce.