since this video released, it's pretty clear to me some form of ruleset could be conceived that would allow skipping some aspects of the round 2 run, for example, not doing elite 4 twice and maybe getting mewtwo earlier as well since you already have national dex and ruby and sapphire

i'm not an expert but it seems a reasonable compromise on what's allowed and what's not.. i have considered TASing this achievement by itself so i would definitely appreciate your feedback about this idea

concrete suggestion:

1. Runners must obtain the National Dex, clear the Sevii Islands Rocket Warehouse side quest, and defeat the Upgraded Elite 4 + Champion. The real discussion lies here, do we really need to keep Sevii island completion as a goal?

We skip the first E4, we skip catching by getting national dex without the 60 pokes and i would vote for removing Rocket Warehouse as a goal, but still we have Rocket Warehouse and have early access to Mewtwo with the glitches to speed up its completion.

1. Timing ends on the first full black frame at the end of the Second Hall of Fame sequence, before the credits.
2. Runs must be completed on the English language.
3. Glitches ARE allowed.
4. Runs performed on the Nintendo DS hardware will have their times converted to match the GBA framerate (~59.6555 FPS (DS) -> ~59.7275 FPS (GBA)). Therefore, DS submissions must include a hard reset within 10 minutes before or after the run. This is done to ensure DS hardware was used. Submissions that do not include a hard reset are not eligible for the timing conversion.

If you're interested in discussing this topic further, I suggest you join the Gen 1-3 Pokemon Speedrunning discord. Most people in the community do not check these forums. In my opinion this would make a cool category, but designing a ruleset that doesn't seem arbitrary might be challenging (f.e. what to do with Sevii). There was some discussion in Discord on this topic when FRLG ACE was discovered.