Jaxis are stone lions that appear in Super Mario Odyssey. They inhabit the Tostarena region of the Sand Kingdom and can usually be found at Jaxi Stops. Jaxis are the main method of transportation in the Sand Kingdom. You can pay a fee of coins to mount them.
They'll take off as soon as you mount them. They can move very fast and they can even run across poisonous areas. Unfortunately,they can also be difficult to control.
Statues of Jaxis can be found all over Tostarena. These 'Statues' are actually living Jaxis in a frozen state.
They appear in Wario Land: Hunt For The Ring. Wario can mount them and use them to get across a level faster.