He should be considering Apocalymon (Who is listed as a type 1 abstract on the abstract page) is a thing. And considering the likes of the Digimon Adventure cast can affect him (outlier), then so can the likes of the Royal Knights.
I’ll just go over Enerjak’s most formidable abilities (some may work here and some won’t of course).
Mind Manipulation/Memory Manipulation/Corruption: Can do this with a thought or through possession. Can control minds, corrupt people into becoming his avatars like he did with various Echidnas, or alter memories by restoring them or erasing them. It can also bypass 2-A resistance.
Soul Manipulation: Capable of ripping souls out of the body, leaving them in a zombified state and can place them into other beings or robots.
Type 2 Conceptual Manipulation: Master Mogul, a being who is inferior to Enerjak was able to mortally wound The Ancient Walkers who are type 1 abstracts with a normal Chaos energy attack. Should also be superior to Sonic’s who destroyed the entire Chaos Force and Illumina which reset the verse into the Post-Super Genesis Wave timeline.
BFR: Can send people to other dimensions and it has cross multiversal+ range.
Matter Manipulation: Can control matter at the atomic level and can use it to deatomize opponents.
Existence Erasure: With a wave of his hand, is capable of erasing beings from existence. Did this to General Kage Von Stryker and his city.
Alphamon has shown to be able to fight without his Digicore. That's the entire plotline of the end of Re:Digitize. Also Mid-Godly.
I dunno if that counts, but it's nice I guess. Sstill has to use it to erase Alphamon before getting sealed.
Not an issue seeing as Royal Knights traverse their entire Network and other Networks on a daily basis.
He's gonna have one hell of a time seeing as Alphamon is an X-Antibody Digimon meaning his resistance is pretty high seeing as he as a baby is resistant to Yggdrasil's Particle Worm in which is a multiversal wide erasure that even threatened to erase Beelzemon (One of the Seven Great Demon Lords) who had to obtain the X-Antibody just to survive. He's still even more resistant as the X-Antibody adapted to Yggdrasil stronger version of it.