While the Domeheads in LBT 8, 11, and the TV Series, don't appear to match the ones seen in the Mountains that Burn, this dude here kinda does.
Notice the Domehead next to Mr. Threehorn
Now that this movie helps back my theory of Fanged Flatteeth, now we can have Chomper eat Fanged Flatteeth and vanquish the bad Chomper briefly seen in movie V forever.
Notice bad Domehead on right