The Evalcharr can be found with NPCScan. You will need to add it, his NPCScan ID is 8660.
You can also use this macro to help find and tame this guy:
/tar The Evalcharr
/cast Tame Beast
Unfortunately for those looking for him, he is on a relatively long spawn timer. It seems he can spawn anywhere from about 32 to 48 hours since he was last tamed or killed.