Hmm, that's so odd, because I also left only this mod enabled and he wouldn't do so. When I disabled it and left no other mods enabled, the behaviour was restored. When I also enabled every single mod that I have and disabled this, he would fire. I tested this on the map The Power of the Underworld on the moddable executable, for context.
Maybe it's an isolated case. Thanks for the reply, and sorry for bugging you about it.

I checked everything and left only this mod enabled everything works. In vanilla SS3, the Major Biomechanoid fires a rocket after death.

I found a bug with this resource pack that affects the vanilla SS3 Major Biomechanoid.

I was trying to figure out why my MB wouldn't fire a rocket after dying, which was a feature added to Fusion (pretty much restoring the behaviour from Serious Sam Classics and HD). After I disabled this pack, the MB now fires a rocket on death, which is the intended behaviour.
Your pack is somehow interfering with that enemy's parameters. Could you please take a look?

Hey soul eaters Alpha + Beta where is that giant rainbow eye is best enemy mod for BFE i think

So far, the only OG BFE custom enemy packs not in Fusion are the Doom 3/Quake 4 Monsters and Opticus' Soul Eaters Pack "Alpha" + "Beta", Biomechanoids "C" Pack, and Enemy Pack ZETA. I could be wrong though, there might be more

ss2 monsters are already there, so I don't think it makes sense, because no one will use it, you too ))))

And pls make this another SS2 enemy resources Alpha Reimagined and Future Enemy Resource Pack:( https://www.youtube.com/watch?v=CvTfNeyOmLo ) for fusion pls

Hey! Do you make this SS2 enemy resources:( https://www.moddb.com/mods/classic-serious-sam-ii/images/classic-serious-sam-ii-enemies ) for fusion pls

Pls port more! (thanks)

Hell yeah, I won't have to go back to OG SS3 to use these cool felas (if I ever get back into moding )

THAAAAAAAAAAAAAAAAAAAAAAANK YOUUUUUUUUUUUUU!!!!!!!!!!!!!!!!!!!

Cyberdemon Khnum is the most brutal speaces (Big Rocket)

No I usually do not do that, well some authors just did not answer me, although I added to friends and wrote under the mods, and of course already started to write to me under the mod when I have already ported. Those who did not answer me I understood that their seravno already, and he will not mind, because applications to friends just canceled and mod mod mod did not respond. If against it, I can easily delete their content.

Man, do you just take random ppl's stuff without permission or something? XD

Nice