They are by RetroNC, linked in the credits section: www.youtube.com/@retronc

Was a bug with the mode-switcher, he's back up there now~

Yes, I will be making the bottom section 8x3 by adding Favorite Mega, Grass Girl, Furfrou, and a fourth box I'm still split on.

As a Cherrim on top, sprites will now show their names on hover, even all those Alcremie forms.
The only Z-A specific update here is that Surplus Mode allows Chikorita, Pignite, and Totodile lines in Gen 9 Starter, but any new additions will make it on the site in time. (6/6)

In Silly Mode, I've pulled out all the stops. You want GMax Pikachu to be your Gen 1 Starter? Is Chill Drive Genesect your pick for Gen 5 Legend? Are you thirsty for Poltchageist as your Gen 8 Gimmick Form? Do you demand Duraludon as your Favorite Pseudo? This is the mode for you! (5/6)

Surplus Mode also fills in some niche options elsewhere, such as picking PLA Cyndaquil as your Gen 8 starter, Colosseum's Espeon or Umbreon for Gen 3 starter, or picking the fully evolved version of the regional bug or bird. (4/6)

In Surplus Mode, Megas, Regional forms, and GMaxes will be added to the type columns of their base form. In Standard Mode, Megas+GMaxes appear in the Gimmick column for their base's gen, while the rest appear in their release gen. In Surplus, they're all in both! (3/6)

In Strict Mode, Gimmick forms are restricted to the Gimmick column, and the PokeStar opponents and other minor forms are removed from the grid. The dedicated sections such as Favorite Vivillon will retain the minor forms. (2/6)

there's only been some bugfixes in the last few months, but we'll be getting updates for ZA soon