From the author's README on Thunderstore

base set of a few tricks I was working on, will be adding more soon!

Tricks

360 Pop Shuv-it mid (any pop)
heelflip (any pop)
kickflip (any pop)
n_kickflip (any pop)
ollie mid modified (any pop)

Install

Open the Animator Studio in game (F8), go to MARKET and install it there, or install it with the ReSkate launcher. Then switch the pack on in PACKS.

Install Setsuuu

You need ReSkate and your own copy of skate. on Steam.

Open ReSkateLauncher.exe and go to MODS.
Search for Setsuuu and click install. The launcher also installs anything it depends on.
Press PLAY. In game, the MODS tab of the ReSkate menu (Insert) turns it on and off.

Or install it by hand: download the .zip and drop it on the launcher window, or unzip it into its own folder in Mods\ beside Skate.exe.

Maps show up in the ReSkate menu's level list. To join a server running a custom map, you need the same map installed. If the game won't load after installing, see known issues.

skatemods doesn't host or review this mod. The download comes straight from Thunderstore. Only install mods you trust, because scripts can run code.