can't find via google pls help

Dont know if you were looking for monster area lvl
https://diablo2.diablowiki.net/Area_Level

If you looking for lvling guide, check the sticky page in this forum:
https://forums.d2jsp.org/topic.php?t=24918272&f=57

This post was edited by SIVIART on Oct 13 2021 11:30pm

EVERYTHING EXCEPT SUPERUNIQUES:

As a reference, here are the alvls for classic: https://www.diabloii.net/forums/threads/area-levels-classic-diablo.413093/#post-4040277
Once you know the alvl, it's pretty simple:

regular mobs: mlvl=alvl
champions: mlvl=alvl+2
uniques & minions: mlvl=alvl+3

SUPERUNIQUES:

Those have a fixed mlvl (not based on alvl):

andariel: 12|37|62
duriel: 22|47|72
mephisto: 26|51|76
diablo: 40|65|90
other superuniques: data missing

This post was edited by xhul on Oct 13 2021 11:59pm

i don't think mlvl follows alvl in classic, e.g. special urds are mlvl 85?

They do, at least for everything randomly generated (superuniques are the only exception).
It's just that alvls are different (what SIVIART posted is for LOD, check the link in my previous post for classic alvls).
Regarding urdars, the highest mlvl they can have is 77|79|80 (regular | champions | uniques & minions).

This post was edited by xhul on Oct 15 2021 04:31am