Example:
<npc id="934482" displayId="34482" level="120" type="Teleporter" name="Lionel Hunter" title="Eva's Knight" usingServerSideName="true" usingServerSideTitle="true">
<race>ETC</race>
<sex>FEMALE</sex>
<equipment rhand="48512" />
<stats str="88" int="79" dex="55" wit="78" con="82" men="78">
<vitals hp="8446" hpRegen="10.5" mp="2355" mpRegen="3.6" />
<speed>
<walk ground="36" />
<run ground="160" />
</speed>
<attack physical="1950.2231755595" magical="1331.5869440987" critical="4" attackSpeed="253" range="40" />
<defence physical="405.85106382979" magical="297.0297029703" />
<attribute>
<defence fire="150" water="150" wind="150" earth="150" holy="150" dark="150" default="150" />
</attribute>
</stats>
<status attackable="false" />
<collision>
<radius normal="12" />
<height normal="22.5" />
</collision>
</npc>
IF it is custom, you need add --> displayId="34482" and the id of the mob as you want it to look.
Remember to respect these values, they are necessary for you to see the npc well.
<collision>
<radius normal="12" />
<height normal="22.5" />
</collision>