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Solved!

So for a mod that I'm making, I need to track a custom mob using variables. I already have the tracking part, and the variable that is assigned to the mob can be used to set velocities, held items, effects, etc. My question is, after I lose tracking of it momentarily, and the variable gets reset to null/0, are there any combinations of functions I can use to regain tracking of it and reassign the variable to the mob, so I can change it again?

I have already tried Entity.getAll(); with a for loop testing Entity.getNameTag on the selected mob, but it never detects the custom mob as having a name. If anyone can figure out how to convert an entity's unique ID into a mob tracking variable, that would work too.

When I say a tracking variable, I mean how you can use:

customMob=Level.spawnMob(x,y,z,mobID);

setVelY(customMob,99);

to set the velocity of a specific mob.

I don't want to use attackHook(), since I am using the tracking to make my mob immovable and invulnerable, and they player could pour lava and kill the mob without attacking first.

Thanks for helping everyone who responds.

With more testing, I found that Entity.getAll() in conjunction with a clientMessage(Entity.getNameTag(mobs[i])); inside a standard for loop prints out all names correctly, but

if (Entity.getNameTag(mobs[i])=="CustomName") {

print("Found it!");

}

does not, in fact, ever get executed. Am I missing something really big here?

That could be one way, but the way I meant it was recovering the mob in a variable after rejoining. Anyway, I solved it by myself, the Entity.getNameTag method does work, but I just spelled the name slightly wrong of the mob