K-Koma seems to resemble the Yo-kai Komasan but with more American features. Instead of a white fur, he has a pale indigo coloured fur. The hitodama flames are showing a deeper color of blue than that of Komasan. Rather having swirls, he has an indigo stripe across the outer side of both eyes. He carries a yellow backpack rather than a sack and has a green fanny pack rather than a wallet. He has also wears a red bandanna and carries a sign with "NY", the initials for New York, on it. K-Koma is the oldest of the KK Brothers. K-Koma has a similar personality than Komasan and Komajiro, however, K-Koma is a little naive and more easily impressed.
K-Jiro has more resemblance to Komajiro, as well, like K-Koma, with more American features. He has pale orange-ish or bown-ish fur and like its brother, rather having swirls like Komajiro, he has stripes across the outside of his eyes, but the stripes are showing a deep orange color. He carries a green coloured backpack, wearing a blue bandana around his neck and wears a brown cowboy hat. K-Jiro is the youngest of the KK Brothers. K-Jiro has a similar personality than Komasan and Komajiro, however, K-Jiro is more aware and smarter.
Yo-kai Watch 3
The KK Brothers can be befriended after completing the Sushi-only Request "Across the USA! KK Brothers' Journey", after which they can be found outside the sushi restaurant in New Demon City and can be battled once a day for a chance to befriend them.
To complete the quest, the player must find and talk to the KK Brothers in several locations.
The locations are as follows:
Chapter 2: South of the grocery store in South Mond Area. The player will automatically start the quest. Scan the area around and fight Dimmy;
Chapter 4: North of the StreetPass apartments in East Cashew Area. Scan the area and fight Babblong;
Chapter 5: In Damien's Farm;
Chapter 8: East of the blacksmith in Walnur Village. Befriend Myccar to complete the quest;
Chapter 9: Outside the sushi restaurant in New Demon City. Buy the most expensive sushi and give it to them, then they will accept to battle the player.