Using

the Mouse, move Pumbaa left or right by moving the mouse left or right.
Click the left mouse button to burp. Move the mouse up to mondo burp. Click
the right mouse button while moving the mouse left/right to produce a
left/right tail swipe.

Using the Joystick, move Pumbaa left/right with the left/right axis.
Press button 1 to burp. The up/down axis produces mondo burps.
A combination of button 2 and the left/right axis produces a left/right
tail swipe.