Baby-mo-chi: A very small Forest Tam, he lives anywhere in the ground so long as it's not under a willow tree. He eats mainly leaves, and other things with similar nutrients. It's rumored that the swaying and rustling of the Willow leaves and branches makes him think of ghosts, and scares him, but no-one know if this is true.
Imochi ("Potato bug/Potato grub"): About the size of an Earth caterpillar or grub. Lives in cabbage fields. He loves to eat cabbage rinds (or whatever you call that hard part in the middle). His dream is to someday eat a piece of cabbage with a lot of mayonnaise on it.
Koganechi ("Coin-beetle"): S/he has a shiny, iridescent body, which is rumored to be about the size of a 500-yen coin (um... about an inch or more across). Can be found around Mount Akagi and sometimes the flashier areas in town. It's believed to get its nutrients either from money, or something stuck on money. It's rumored to know the burial place of the Treasure of the Great Tokugawa Shogunate.
Tento-chi (Lady bug): Lives in safflower meadows. Makes a living by exchanging Safflower oil to the Koganechi. It has charming polka dot stars shining on its back, but they can't be seen, even using the magnifying glass.
Chobi-tamachi ("Little Round bug"): Chiefly lives in the lower branches of trees, and spends its life time going back and forth over thin branches. It uses certain flower pollens as make-up, and gathers various flower extracts to make beautifying lotions with, so it is suspected that it is a make-up maniac.
Minochi (Caddis fly larvae): It's always covered in a cloak of twigs and leaves, and lives on many-branched trees. It is the most fashion-conscious of the Mushichi (Tamagotchi bugs) and changes at least 5 times per day!
Mushibachi (lit. "Insect (infested) tooth", ie. Cavity): His normal habitat is inside a Tamagotchi's mouth, but out of an increasing sense of racial guilt about the fact that he was a Cavity Bug, he moved out of Tam Mouths and spends his time in the natural world. His mighty spear makes him quite popular among those of the opposite sex. [no comment]
Gejichi ("centipede/millipede/icky thing with many legs, often spiny"): Often seen below trees with spiny or thorny flowers. The spiny hairs covering his body not only protect him, but also allow him to rub against the asphalt while running around, thus cleaning the streets.
Fun-koro-gachi (lit. "roller of dung", Dung beetle). He has a round body and often lives in farms and fields. He lives on poop with special nutrients in it. His hobbies include playing with his own poop by rolling it around.
Kabutochi (lit. "Japanese traditional battle helmet-beetle", Rhinocerous Beetle): Although it resembles the Rhinocerous Beetles of Earth, it can be told apart by the fact that it stands on its two hind legs when active. It is incredibly prideful and vain, and because status is decided in his culture by body size, he spends all of his time body-building and making himself bigger.