What about a run for the full plaza? As in all hats, bubbles, music, medals, and accomplishments? I get that that would take a millennium, at least for beginning runs, but I feel like optimizing it would be quite an intriguing task. That idea is actually what I came here for, as the idea had popped into my head a while ago for it. I'm thinking of several different categories for different levels of completion, with All Hats being one category, and All Music being another, and so on, as well as a full 100% with EVERYTHING that I described at the beginning. Also, While puzzles would logically be included in "100% completion", it doesn't get a speedrun for a reason; Puzzle Swap Panels should be actively excluded from the 100% completion status.

In my hypothetical, the strategy would likely be as follows:

For hats and bubbles: Get both your line and Playcoins filled beforehand, 100% Find Mii I & II to get all hats from each, then grind for Plaza tickets in; The beginning of Monster Manor (making sure to make big rooms as to get two tickets from each type of chest, leaving once all are obtained), All of Mii Force (you get a Plaza Ticket every time you beat a level, and the game is somewhat short), all of Warrior's Way (With infinite Playcoins, you will be reaching milestone after milestone very easily for army size increments throughout the whole game, and will reach other milestones throughout. Warrior's Way is a goldmine of tickets your first time through), and play other games as you see fit, and make sure to get as many obscure tickets along the way as you can (such as finding rare zombies at all opportunities in Battleground Z, as an example). It's important to remember for Plaza Ticket collecting to go and buy everything at the Exchange Booth every 8 tickets (or every 4 if you're only doing hats, or only doing bubbles), or if you're collecting them fast enough, then at every opportunity, and use the time waiting for a restock to gather even more.

For music: This one is far more straightforward... go into each game and encounter every music track as quickly as possible.

Medals: Complete every separate plaza game so it has a completion medal next to its icon.

For accomplishments: Gonna be honest... this is the one part of the run I didn't think through very thoroughly. It's near impossible to get some accomplishments without playing back in the 3DS's prime. If you went to a gaming convention in 2015, getting 500 StreetPasses would be NOTHING, but.. since you can't do that anymore, upon further examination, accomplishments may need to be excluded as well, for similar reasons as the Puzzle Swap panels...

Pure 100%: Everything listed above.

Please like my idea :DDDD