Is Loaded% the name that we're gonna go with? I'm not a big fan of it. But I like the category as mentioned and I'd like to see it achieve the same level of interest as Gull%.
Character-specific runs don't really work, Mario% is a thing because Mario is considered the worst character in the game by most players so it's considered a meme to do the whole run with Mario only.
I like Max Powerups% even if the name could be improved.
A full game run for a category like this might be a bit too long for how little it changes. Maybe make it something like a specific World RTA with random character on every level?
Speedrun dot Com only allows a certain number of nested sub categories of runs, so making character-specific spots for ILs would possibly require a full separate sub-game of this game, which is a lot to maintain. I like it as an idea, but there's not enough demand for that much maintenance required.
I like it as a challenge run, but I think the kind of ruleset you follow in your video isn't that much of a pure "waterless" challenge. A category extension similar to waterless has been suggested (called "Dry%") and it potentially could work as a category extension, but nobody has shown any initiative for running it using a ruleset that's strict enough that it would be interesting as a category extension.
I'm not sure if this would make a good category extension, or even a challenge run. That doesn't mean that challenge runs can't make good category extensions, but it would need to be something akin to "Damageless" where the difficulty is in good play, rather than a very limiting rule set.
I think this category extension suggestion would be a good idea for a spot on a bingo/lockout board but I'm not sure it would make a good full category.
I'm not a big fan of the name "7-7%" but something like Max% Minimum Stars would be a better name for this category, and I think even though it would just be a bunch of back to back ILs I think it's an okay category. Clutter could be cleaned up a bit too by combining some overlapping categories, I think.
The game uses an internal flag in the code to determine whether to use a faster timer or a slower timer, and reloading the save after the Bowser Junior cutscene runs the code that sets the timer a second time, but doesn't reset the flag, so it uses the faster timer. It saves 3 to 6 minutes per cycle.
All categories aside from ILs are timed using "Real Time Attack" rules which do not allow pausing of the timer under any circumstances. Mods and verifiers will, depending on some factors of the run, re-time a run that has timer pauses in it to return an accurate RTA time for the entire run.
I think it could go as low as 1:1x:xx if Toad crouch jumps become a norm (they're faster but have a smaller frame window for the trick).
Bowser's Fury MP was originally a CE on launch, but due to a lack of support (as BF multiplayer is local-only) it was relegated. I'd like to point out though that it doesn't need to exist on the boards to be run, and running it regardless of it existing could inspire enough support for the category for it to return to the CE boards.