Which enemies carry explosives that can be blown up with Fuse

EMP Grenades/Bombs

So I just learned from Are Gatekeepers vulnerable to EMP Bombs? that Gatekeepers can actually be heavily damaged from EMP grenades/bombs, and can even have a chance to be stunned by them for 2 turns!

I tested and confirmed this myself. In the following screenshot, I used an EMP Bomb on an undamaged Gatekeeper, and it took something like 12 damage, and was also stunned:

Which is weird, because you can't hack a Gatekeeper, so who knew it had robotic components that could be damaged by an EMP?

Flashbangs

I've heard that Flashbangs (or being disoriented) can lower a target's Will stat, which would make it more vulnerable to mind control. I decided to test this out too.

The following is the Will stat of an undamaged Gatekeeper versus a fully upgraded (i.e. has all abilities and fully upgraded Alien Psi Amplifier) Psi Operative using Dominate:

The target's Will is 110%, which reduces my chance to Dominate to 80%. After hitting the Gatekeeper with an EMP Bomb, followed by a Flashbang (so that it's also Disoriented), I checked the chances again, and the Gatekeeper's Will was still 110%.

I've also heard that Flashbangs (and being disoriented) can disable some of the Gatekeeper's abilities, but I haven't tested this out yet, and I'm not sure which abilities exactly would be disabled.

According to the XCOM 2 wikia page for EMP grenades, it looks like only robotic enemies are affected, but can cause them to shutdown in addition to damaging them:

The EMP Grenade is a grenade in XCOM. EMP Grenades ignore armor when dealing damage. They only affect robotic units.

The EMP Grenade also has a chance to cause shutdown on robotic units. This makes it a weapon of choice when dealing with sectopods, allowing XCOM squads a little more time to deal with the threats in the area.

However, the EMP Bomb has a bit more utility in that it remove the ADVENT shieldbearer shields from any enemies, among other things:

• The EMP Bomb are the upgraded version of EMP Grenades
• EMP Bombs/Grenades deal damage to Codex. It also can stun or disorient them.
• Make robotic enemies easier to hack, reducing tech score by 10.
• The EMP Bomb will also remove the shield granted by the ADVENT Shieldbearer energy shield on any target, regardless if they are mechanical.

From the EMP Bomb wikia, it looks like EMP grenades can also damage Codex enemies, though it wasn't explicitly stated on the EMP grenade page.