Pokemon Legends Z-A - Chespin spawner overloading

The way Pokemon spawn in Legends Z-A is that spawner objects are placed around the map, and they spawn one or more Pokemon in one or more spots nearby. For example, the burrows by the entrance of Wild Zone 17 are actually three separate spawners, each with the same 1-spawn limit of either a 5%-alpha Diggersby (90% of the time) or a 5%-alpha Chespin (10% of the time). Each time the Pokemon are respawned (for example by running 75+ units away then getting back to within 50 units of the spawner, or just flying to the zone, or sitting on the bench to advance time), all of the burrows are rerolled.

Still, a limit of 3 burrows, each with a mere 10% chance for Chespin, is really painful...

As it turns out, there's a way to fix that! Dubbed the Spawn Overload Glitch, by precisely baiting a Pokemon outside of the spawner's range (then saving and quitting and reloading), then running so far away that the spawner spawns a new Pokemon while still staying close enough to the previously-spawned/baited Pokemon to keep it loaded (then saving and quitting and reloading), then baiting the baited Pokemon back to near the spawner's second spawn (then saving and quitting and reloading), then finally making the game refresh all spawns, the game is tricked into keeping that extra spawn in the spawner, and correctly rerolls it each time you refresh the area (until you KO or catch one)... and each spawn will be a different Pokemon species, meaning you can boost Chespin's spawn rate from 10% to 100%!

See this for a guide:
https://x.com/ItsPapaJefe/status/1986...

0:00 - Respawning and checking Chespin
If you only care about shinies, then because of the whole 'ten shinies are saved in the shiny queue' thing, after setting up this glitch you should just turbofire A and sit on a bench a thousand times... but since I actually care about correct-nature alphas (and need to uncover the Chespin to see whether or not it's alpha, and then catch it immediately because it's not saved in a spawner queue), I have to repeatedly fly and then run in and check the burrows every time, which is the first part of the video.

If I spawn an alpha, then I leave the zone, let out a Pokemon that can one-shot it (Delphox in this case), then wait for all the Pokemon to stop crowding around the zone's entrance, before saving the game (in case the Nest ball fails) and then quickly running in, KOing it, throwing the ball, and praying. Alpha Chespin only has around a 4.44% chance to be captured in a Nest Ball... so it tends to take quite a few resets.

Amusingly, despite not looking for one, I managed to get two shinies in a row in-between two alphas! Still, the whole 'saved in queue' means that burrow couldn't spawn an alpha anymore, so I had to catch it... which was a good excuse to set up the glitch again and record this.

1:25 - Setting up an overloaded spawner
Now, normally I make sure to KO the pride of lions beforehand, since the only way to bait Diggersby 50 units away is up the stairs and into their territory, and they always aggro you on sight... but this time I forgot, though it was night time and (shockingly) they took so long to wake up that I had time to save and quit after the Diggersby disengaged but before the lions aggro'd me again, so I figured why not.

By setting a waypoint near the closest of the three spawners, I can look at it and use the distance as a reference for where to save and quit the second time: anywhere from 100 to 110 units away (i.e. from halfway across the street after the bridge, to hugging the opposite building). Amusingly, at night a Battle Zone can appear in your way, but as you can see here it doesn't actually prevent the glitch.

After reloading, Diggersby and the pack all chase me... but they all de-aggro around the same time/distance, meaning I could safely save and quit a final time! And after reloading I use a bench to refresh stuff without doing an autosave, and show that all three spawners are overloaded with Diggersby + Chespin again.