I'm aware that MissingNo is meant to be an error handler in Pixelmon and not meant to be actually used in battles, but many battle-related traits about Red/Blue MissingNo such as base stats were implemented correctly. Furthermore, MissingNo is completely usable in battle if you give yourself one with the Pokemon Editor or something. Nothing breaks. I don't think it would hurt to include the TM/HM movepool for it.
Here is the archived page for MissingNo from a well known website on Pokemon glitches called Glitch City Laboratories. It details the TM/HM movepool for Red/Blue MissingNo, as well as Yellow MissingNo's movepool:
I think that the Red/Blue TM movepool should be implemented since MissingNo's model and base stats are based on Red/Blue MissingNo. However, I can also see the Red/Blue and Yellow TM movepools being combined since that's what was done with the level-up learnset.