Lucky Beast (ラッキービースト) is the name of several robots around Japari Park. Often referred to as "Boss" by Friends at the park, Lucky Beasts take care of maintenance, feeding the Friends and guiding visitors around if there aren't any human park employees available.
Lucky Beasts appear exclusively in the Kemono Friends anime, with one specific unit serving as a Kaban and Serval's window into past events at the park through pre-recorded memo-logs by Mirai as well as guiding them on their journey. Lucky Beasts are fully equipped to talk and give information on the park and all Friends registered within, but will only do so if a human is around.
The reason Lucky Beasts will not talk to Friends is due to the risk of disturbing their ecosystem, but exceptions will be made if a human is in danger inside the park.
Seeing several Lucky Beasts around at the same time is unusual, but can happen if there's a lot of Friends gathering in one place. One such occasion was the debut concert of PPP's third generation, where Friends have travelled from all over the park to watch.
Though Lucky Beasts only talks to humans, Common Raccoon was able to access memo-logs stored inside a specific Lucky Beast's memory by Mirai by using a park guide's hat. Even a simple feather from such a hat is enough for said Lucky Beast unit to register someone as their user.