The brown Munchers from Super Mario Bros. 3 are "Potatoes", while the four-legged Koopa Troopas from the same game are "Chickens".
"Dino-Rhino-Lino-Bino" (in any order, plus whatever else rhymes with "Dino" he feels like adding) for Dino-Rhinos.
"Durgan Coins" for the Dragon Coins.
"Necro Boom-Boom" for the glitchy Boom-Booms in Mario Adventure note If there are more than one Boom-Boom on the screen, and one is defeated while the other is flying, the flying Boom-Boom turns into a bizarre glitchy mish-mash of Dry Bones sprites.
The creepy version of Kirby from Super Talking Time Bros. 2 has become "Zbambabar".
"Wizard" for Magikoopas.
"The Elf" for Link from The Legend of Zelda (or occasionally "Lunk"), when he appears in Super Mario Bros. X hacks.
"Armageddon" (or, as he pronounces it, "Armegadon") for the pilotable Virs mechs in Copy Kitty
"Satan" for Maszlyg (the industry-styled boss), "Wizard" for the gear-shooting Yinimros, and "Kettle" for the Hoagalls.
He calls recently-reencountered Burst Kryjil "The Emperor", probably in reference to how he put arcana names in his Copy Kitty video titles. Even though in the video where he first fought Burst Kryjil, the Hanged Man was in the title rather than the Emperor.