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Snake Mountain in the 1986-7 mini-comics:
We see just Kobra Khan (or a green Rattlor?) living there with Skeletor in "The Terror Claws Strike" (Spikor appears but has his home elsewhere).
It's Kobra Khan and Beast Man with him in "The Fastest Draw in the Universe" (oddly, KK commands a team of lizard men, pic related).
We see just Evil-Lyn and Skeletor living there in "Between a Rock and a Hard Place".
"King of the Snake Men", "Snake Attack" and "The Ultimate Battleground" follow a pattern of the Snake Men living there as a group, with Skeletor the only Evil Warrior they interact with.
In "The Search for Keldor", the Snake Men are gone, Skeletor summons Scareglow and Ninjor in, and we see the room where he stores Faker. They never appear in another mini-comic.
Finally in "Energy Zoids", the Snake Men are back, along with the newly-invented Twistoid and a one-panel cameo by an off-model Beast Man (he's wearing earrings and a collar like Fang Man's, of all people).