Tsuchinoko is a Friend who appears in Kemono Friends Pavilion. This appearance is based on her Generation 2 (Nexon) incarnation, which was added to the game along with the other starting Generation 2 Friends in Version 1.4.0.
Taking after her counterpart, Tsuchinoko is among the rarest of the Generation 2 Friends. Her rateups are all uncraftable or limited, and she additionally lacks an area affinity that would allow her to at least spawn outside of her item, like Plains Zebra. Until more items become available, your only hope is luck.